I'm trying different styles to find an easy one I can use so that is why the figures I drew are not all the same. Some of them are also from 1 minute drawings (I give myself 15-20 minutes trying to observe what I should draw) and some are untimed. I've been doing this for 3 months now, I know that I can't expect to be a professional by now, but I just want some tips on how I can improve.
Here is my work
References:
Mostly comic poses (ex. Marvel, DC, etc)
https://www.deviantart.com/senshistock