I’m happy to see another MSH transformation in VTOL. It really looks very strong structurally. I would increase the distance between the CG and the rear motor >> the rear motor will stabilize the model better and consume less.
I would start with MP; then you will discover QGC.
Do not be afraid with Pixhawk & Arduplane. Any questions that arise will be happy to help you.
Atico from Bilbao