First, congratulations!
Your problem is more of a software configuration one. Here’s a possible solution from yatli:
And there are plenty of other possible solutions in the forum.
I’m using sway(on a wayland session) right now. If you are interested in that, here’s the necessary config for sway to rotate the screen:
# DSI-1 is 720*1280
output DSI-1 transform 90 pos 0,0