I don't really do renders with Blender, so if the image looks polished, that's probably realtime rendering in game.

I work in Blender and Unity, primarily in the creation of VRChat avatars.

Could be worse lol

A few youtube channels I've used heavily in the past to learn what I know:

SpeedChar (efficient sculpting workflow)
Flipped Normals (efficient retopology workflow)
Royal Skies (short-form general blender tips and tricks)

If it looks like this in blender, get rid of it.