Sorry for the mess,
On number 5 you say All the Game Overlays.
Why don’t you use the Game Overlay device?
for the Level Game Overlay 
Maybe use a game overlay text [1] on the top right showing
lvl 1 0 exp
I think this guide can help you.
Are you going to make the shop?
It requires the List in the Call of Action which is in the Season Ticket.
This one
You can change to button that doesn’t channel on anything to give a cleaner look ↩︎