Which sizes do you use for solving with pio/GTO+ ?

*1.Generally, is this al realistic model to solve spots?*
I am not sure. On the flop I only have to sizes but I might need to add an overbet.

2. Do you have anything to criticize?

3. Is there any 3Betting going on some streets in a GTO approach?
If so I´d need a bigger tree.

4. I am a beginner. I need to keep it as simple as possible and just get started for now. So if someone with experience could reduce the tree
the necessities I´d be thankful. My first goal is to get a general understanding of how to play hands gto.
**Short: So I just need a basic setting. Nothing advanced . Goal: Understanding how ranges are generally played.