stranger12,
You need to do a bit more research, though given that you haven't undertaken much training yet, that is understandable.
You're younger than many who start out on the commercial route so that is not an issue. Before you spend too much money, get a Class One medical - that is imperative and don't listen to other peoples 'stories' about what's an issue/what isn't.
Worry about the rest later but do consider part-sponsored/mentored schemes at this stage.