I thought that I'd just put a word in for parrotlets since you're considering them. I own a pair of celestials which I allow to breed a couple of times a year. I then co-parent the chicks.
I assume that in a few years when you have to leave home, your parents will be fine looking after your bird until you get a place where you can keep a pet. However once you have somewhere, an apartment maybe, you'll have noise issues and neighbours to consider. Parrotlets tend not to be very loud and are quiet compared with GCCs so that might be worth considering.
I find parrotlets to be very engaging little birds, I've taught my 8 week old babies to do simple tricks like 'wave' and 'turn around' so they seem quite intelligent. They don't hold food with their feet in the way that bigger parrots do but in other ways they are quite similar. Mine are happy to sit on a finger and have their head scritched and will snuggle in under my hair as it starts to get dark.
They can have issues with nipping but a lot of that comes from people not bringing them up properly, they need to be trained just like bigger parrots. Hand reared parrotlets (and many other species) can be prone to issues like plucking so if you do decide to get one, I'd suggest going for a co-parented bird or a young parent reared bird if you have the patience to tame it.
I hope that was helpful. Have fun deciding
