This is a neat idea so far - the kind of thing I want to do when I'm coming up with full worlds.

I have some suggestions to make your long-term work a bit easier here:

You've definitely got the plate impact setup going on here, but you've also got a subduction zone right between two continents that haven't collided yet - which means we're looking at a very one-sided equation when it comes to the mountain ranges and volcanoes that will be forming along that line. You might consider taking a 3rd color and indicating where continental crust ends and oceanic crust begins, as well as marking which plate is subsiding, as well as which plate is floating. This can also be done symbolically - as in this map.

The other thing that gives me pause is you seem to have a major inland sea on the larger continent, in an area which (presumably) is being pushed up by the tectonic impact of the smaller continent. Why is that inland sea there? was there rifting activity in that area in some former epoch that failed to split the continent? (see the Rio Grande rift, or the current state of the east African rift valley for ideas). In any case, the super-continent you have up top there would need something going on on a tectonic level to make that large of a depression happen in what is presumably a continental crust area.