hehe yea it's possible it seems : p
1. I use Unity because it's easier to strip down the graphics and optimize it compared to UE4.
2. I started in 2017. I was only a 3D artist and did not know progamming, so a couple of programmers passed but never stayed so I had to learn programming myself. that was exactly 1 year ago when I started programming.
so I already had many year of experience in 3D art and using Unity but never finished a real game project.
3. the answer to this question is answered in nr.2.
4. The best way to start is by starting and taking on 1 feature at a time.
and also: you need serious dedication. The only reason why I finished this is because I have no other choice.
it's making this game or having to do dead-end jobs for the rest of my life. So I sometimes work 12hours a day.
So don't underestimate the mental part of it XD