Unfortunately you've learned an important lesson the hard way, I'm pretty sure most on here have had a few hairy moments in the wet with a car we're not used to. Pay your excess, chin up and get back on the roads as soon as you can, and yeah driver training asap. Most important thing is you and your friend are alright.

Btw.... damage doesn't look too severe and as long as the chassis rail isn't too far warped it could be repairable.