It happens to everyone mate, first time I got the back out when I had my 13 (also first rwd car) was in the wet, came off a roundabout put a bit too much manfoot in to it just as I was going over a metal cover in the road and the back went, I touched cloth a bit but managed to get it back OK. That "experience" taught me a lot and from then on I spent time learning how to slide it and control it. Don't worry about it at all, just get back on the horse and all that and you'll be fine, welcome to s body ownership!
I miss my 13 so much, should never have sold it