I wouldn't build a track bike from scratch if you were a noobie because once you actually get into it, you'll look back and see what you could've done better.
And what's wrong with that? No bike is ever perfect and experimenting is a good way of working out what works for you.
Gabri, there will be bike shops near you that deal with track bikes. Try visiting a few and seeing if they have any second hand wheels or hubs from people who've done upgrades.