I’m just gonna get right to the point here. I’m pansexual and genderfluid, but my parents and older brother don’t know this because they’re some of the most conservative people and don’t exactly support it. I don’t want to just hide this forever because it’s a giant weight, but I’m scared of what might happen if I do tell them. Do you think I should?

Its hard to say whether you should or not with so little context.

I'd suggest bringing the topics up in conversation to see how they react. Ask them questions about how they specifically feel about the topic, like, "how do you feel about gender fluidity?" or, find a news story about someone who is genderfluid and discuss that story with them. Depending on how they react, you can make the decision whether or not to tell them.

Sorry you're in that situation.
In my personal experience I'd say if you're really afraid they may have an extreme reaction and you're still a minor or living under their roof, hold off until you're heading out because you can always tell them later for safety reasons + emotional health. However, I understand that it can be equally painful to feel like you're not living as your true self with them, especially if you don't know for sure how they'll react. Toadpods left some really good advice on testing the waters so I second what they said ♡ You never know, maybe with time you'll change their perspective on these things because they know something has to change if they want to keep you in their life.

Good luck and whatever happens, just remember the world is so much bigger and there's always a place where people will love and accept you as you are.

I think depending on the religion, you can get them to respect your decisions. For example, I am Catholic. My dad says that whether or not someone has a sexuality that Catholics don't really like, you still have to respect the person. If you don't, it's like the same as forcing someone to believe in a certain religion. Disrespect is something that should be frowned upon, not your characteristics. I don't really have much experience with helping others with this kind of thing but hope it'll help.

Don't

I understand that people like the same sex and like to be more comfortable being the other gender, but why do you claim to be pan and genderfluid. No disrespect but thats really confusing and silly. IMO if you say that to yout parents, its gonna be a awkward life for you and your parents would most likely be disapointted with you since you said they are religious. Try to not say it and rethink your ways. The concept of male and female has been there since the age of time but now people are making different stories. Just because its normal doesn't mean its right. Tell an average person about your identity and they would be confused and they would laugh at you. My opinion may be considered harsh but thats the whole point of an opinion. You may choose to be however you want but I just want to give you an insight. Hope you can see the best out of your situation.

Yeah come to think of it Kero isn't really lying.

btw my ID is different because I'm on a different laptop rn.

I think advice from an out of the closet LGBT person will probably help you out more than people who just... have no idea what it's like to be in this situation.
I will say that I don't really believe in genderfluid as a gender identity, only as a form of gender expression (cause it's not possible for your gender to change every so often, your brain doesn't morph, but you CAN choose to express your gender differently). I personally think most people who consider themselves often either confuse identity with expression or they experience fluctuating dysphoria. BUT that's just my own opinion and besides the point.

My first bit of advice is, as much as it sucks to hide it, if you're not sure how your family will react, it is best to wait until you do not live with them anymore. I know. It really does suck. I was closeted until I was 18 and in college, so I understand how much it sucks to not be able to be your true self. But your safety is very important and it's not something you should risk.
Second bit of advice is that if and when you do come out, it may be better to explain it rather than just say the label. For example, with you being pan, instead of stating that you are pan, explain that you can be attracted to anybody regardless of their gender. It helps people who aren't LGBT understand what you are truly telling them. This is especially helpful when you identify as something that could have different meanings to different people.
Third, come out in a way that's most comfortable to you. I came out to my parents over text because I have selective mutism and talking about stuff like that aloud is extremely difficult for me. Text also helps me have time to think to word things properly. Some people may prefer doing it in person, or maybe leaving a note, or even having some fun reveal. Whatever it is, make sure you are comfortable so that's less anxiety about the delivery.

(Also, I don't wanna be an ass, but really Kero? "Rethink your ways"? Sexuality and gender is not something you get to choose. I fucking wish it was. I won't even get started how the concept of genders other than male and female have existed since ancient times as well.)