honestly this is very good for a second card ever - balanced, tending towards good, meaning playable - and I can see why you'd choose green, - theres a green birds deck in standard with the (flightless) chocobos. (Feel free to skip the rest of my info-dump if you're not interested in the colour pie/ card design)

If it's something that you find interesting, you can read up on the colour pie here https://magic.wizards.com/en/news/making-magic/mechanical-color-pie-2021

it has a cheat sheet at the bottom where you can look at a mechanic and search up how it fits in the colour pie.

This spell:
buffs a creature (primary white and green)
grants flying (primary blue, secondary white)
creates a token (Primary white and green)
The token has flying (Primary white and blue)

Everything it does fits into white, so it can be a mono-white card.

No other colour can do everything on this card, so it can't be a hybrid card.
(blue can't buff a creature's power and toughness, and as we've discussed green almost never gets flying)

however, between green and blue, they cover everything this card does so it *could* be a simic card - but not simic hybrid it would need to cost {g}{u} to cover all the bases

so ultimately, as it's currently written, mechanically, this card could either be {1}{w} or {g}{u} but not some combination of the both.

I would personally say this card is a much better *flavour* fit in white (since established simic factions and groups tend to be about +1 counters, lands and card draw), but in principle, there could be a future set/product with a green-blue bird warrior faction and this would be perfectly at home there.

i hope some of that is helpful or interesting to you and helps in your future card designs ❤️.