Hi Zeke!
Your work looks pretty good so far! Your arms look good as well as the hands.
There are some things that do stand out that I think would help you immediately.
Your facial construction is pretty good so far. Good shapes all around. However, i think you may have drawn his facial features abit too high. If you study some sources like Andrew Loomis and his "ideal" facial proportions. He places the eyebrows around the mid-line, or roughly the same level as the top of the ears.
I've attached his reference below as well as edited your image if you don't mind.
Your Chest anatomy looks fine, but some things that could really help the image in terms of depth and perspective would be to understand the underlying forms of the rib-cage as well as the origins and insertion points of the Pectoralis. As currently the pecs on your character look a lil flat (as in they dont describe the egg-like form of the rib-cage) . A bit further into that study and you would notice that the muscles could be used as cross-contours to help describe the main mass of the torso.
Other than that, his feet be looking sick too (The good kind) albeit the feet seem to be of different sizes judging by the difference in the height of the ankles
Somethings that seem like they would help is to first develop a strong Gesture then add form via mannequinisation of the character.
Side note:
Do gather more critique rather than just from my message as its good to develop a large library of critic and from there decide what works for you and what doesn't
Happy travels! I hope to see more from you soon!