I have limited time to work on the project but I'm trying to do at least something every day. I finished (more or less) board design and considering sending it to OSH to get factory-made prototype. If someone see something I should fix - please let me know in comments. That will be my first board made by professional PCB fab.

Just remember about an assumption - board has to be ready to make it at home as well (that's why paths are so wide).