Matty
I came into this job, like you're looking at, straight after A levels. It's what I'd always wanted to do, so I went for it. Here I am 3.5 years later fully valid in a tower/approach environment.
If you think you want to do it, then I'd advise you to go for it. There's no better job (IMHO)!!
Might be worth you getting a look around a tower if you haven't already done so..... that'll make your mind up if anything!!
Best of luck