>>14 I agree with much of this
>>9 I agree with much of this too.
Let's see. When drawing perspective... Well I may have to post on a tutorial thread. You should look up pictures on the internet and copy their poses. This will help. You should also look up "foreshortening"
Also, try to give weight and emphasis to your lines. Crosshatching is an easy way to add texture. You may wish to observe light on your own body to find out about how to shade properly. You may wish to observe your own body for proportions.
You are on the correct path. Remember that comic style is a simplified version or real life. You gain more by studying at the source (real life rather than from other comics.) See how you can create textures, shadows, highlights, etc.
As I said, as many have said, you are on the correct path and will improve if you practice with a keen desire to improve yourself.