Sett - League of Legends fanart

Hello everyone. I have just now started 3D modelling again for the first time in many years. I was never very good but I've picked the hobby back up and I'm starting with this fanart project to shake off the rust and try to get into it. I am posting this because i desperately want tips and feedback so that I can improve myself and the model.

I'm also very bad with the hard surfaces and would love some suggestions to help with that. Draw-overs would be incredible if anyone can spare the time/effort as I'm a visual learner.

I also want to know what my options are for rendering this when it's done. Will I have to retopo the whole thing or are there new ways of doing things now? thankyou very much!