Hello, and welcome to R/C flying!

As you've discovered, it's all too easy for things to go wrong, but most of the foam Supercubs I've seen are still a great place to learn on.
There's no reason to spend money on a much larger glow model like some are suggesting for some bizarre reason, especially if you've got the Hobbyzone BNF Cub which is one of the best trainers out there.

Flying is all a matter of getting the orientation down, and then keeping ahead of the model at all times. This is easy if you have a plan, and know what to expect. Never just take-off without knowing what direction you are going to turn next.
For your first few flights, just focus on a regular circuit pattern in front of you at all times, with a nice, long downwind and upwind leg to give you time to breath, and a turn in the same direction at each end. Focus on keeping the wings level, and expect the orientation to be a bit funny when the model is flying towards you.
I found that slightly turning your body to be in the direction the model is flying makes it easier to figure out what inputs are needed if a wing drops...Just imagine you are in the cockpit.

Simulators are a great help with this sort of thing, and an instructor will definitely extend your aircrafts life-span.

As for your repair, you'll find that 50 people have 50 different fixes. You can use epoxy, which I'd personally go for, foam-safe CA, hot glue with tape, and probably 100 other adhesives. Epoxy is a guaranteed strong fix, though.

Happy flying, and good luck!