Do you need a portable amp or a desktop type? Android or iPhone?
Fiio makes nice little affordable amp/DACs. I'd research amps and save up for one if you really want to dig deeper into being an audio nut.
It'll be tough since you're younger than most of us, but an amp helps power hungry headphones/earphones and brings the most out of them.
Or just get the non pro B3. It should run off anything. Can't guarantee it'll sound as good though.