Thanks for all the useful info. I will need to re-read many times I think!
I'm definitely not planning on making a foam board aircraft my main/only plane as a beginner, but I thought it might be useful as a <250g machine that I could fly on my own, wouldn't be a problem if I damaged it, and would be a bit more like a real plane than the 60g powered gliders that seem to be the alternative in that space. The foam board plans from Flite Test and similar seem relatively straightforward, both for assembly and repair, and I hope I'll learn something as I go.
However, as soon as I'm a bit more competent on the sim, I'll probably get something like a Riot - it removes an additional variable (because I'll know that the plane is predictable), and I know that there are people at the club with them, so I can get advice.
I believe the club is Mode 2 (certainly the ones I've met are). They have trainer aircraft, and people who can do instructing, but no official instruction program, so it's not as simple as picking the system the instructor uses.
I'm not really interested in heli or multi-rotor flying, but I'm definitely setting the floor at a computerized transmitter that can do multiple models.