Obviously I'm not a professional but these are just some tips!
These are just some tips it is always good to have an art style BUT there is no excuse for no bad anatomy helpful sites/ vids :https://posemy.art/app/?lang=en , https://www.youtube.com/watch?v=PapnhYFf5-M and https://www.youtube.com/watch?v=u7xcWi_6yIQ