Replying to Scared about the future

So basically I'm on track to fail all of my final exams in the coming week. It's pretty much granted that I won't be going to college/uni, so my plan is to go to the mountain guide school in Chile to become a ski guide. However I'm scared about costs/application rejection/can't find a job afterwards etc etc. So I've applied for a job on the railways as a back up but I don't really want to stay in the UK cause it's miserable and I feel like a disappointment and I just need advice tbh

pls help NS