I would also not bring them together, if ever. My Ekkie and GCC ones had a bit of a fight, i forgot both their cages were open

, and Kodie bit Squeaky on the beak, it still has a little puncture in the beak, i'll try to take a pic. I never wanted to share this story, cause i feel that i almost failed Squeaky, his head could have been ripped off, but to emphasise on the importance of keeping a big birdie away from a small one, i will share a pic to show you. It doesnt look that bad any more, his beak has grown out a bit, so it looks ok now, but i shiver to think what could have happened.
Not the best pic, its hard to get a good pic of such a small beak...
(its on the left lower side, it was close to the cere when he was bit, but it grew out this far now.)
I too think a Tiel would be a great beginner birdie, they can also whistle so it would make him want to teach the birdie some new tunes(sometimes they can talk, one of mine does). And plus, you do get tiels in snow white, hm, here anyway.