Learning to sing. Watch
just need to refine it.
i don't think you'd need classical training at all.
go to a choir, your school has music teachers so ask them.
where in london are you from? there are some briliant music schools around me (watford)
I personally found classical training unecessary as i want to sing pop music so no, if you don't fancy being classically trained, don't feel you have to as there are teachers out there who teach popular and musical vocals even though there are probably many more who can classically train you