I lived and worked in China for 5 years, and played this game for most of the time I was there.
If you ever plan on moving out of China then you should consider getting the international (JP, NA, EU) version, and get Ionlife (VPN) to play outside of the Great Firewall. Reason is that the Chinese servers is separate on its own so if you plan on moving out you will have to leave everything behind and start over.
Note that purchasing items on MogStation with a VPN will trigger errors so you may want to time your purchases when you are not in China. Linking your credit card for autobilling didn’t trigger anything while I was there at least, so paying subs should be fine. You can always contact SE customer support if you encounter issues at any rate.
Download the free trial from Square Enix (make sure it’s NA as you’re from the States), set up an account on MogStation. If everything is fine till this step, then you’re good to begin your adventure!
If not because you are accessing MogStation via a VPN, then you will have to get a friend or family member Stateside to set things up for you. It will also mean that you will need to rely on them to purchase the full game and expansions when you are ready to fully dive into this game.
The Japan Datacentres (Elemental, Gaia, Mana) are the ones you should make a character on due to proximity and thus better ping - you will also be able to make characters on EU and NA DCs, and make character transfers.
Tonberry server on Elemental DC is the capital of the English-speaking players, however it is almost always locked for character creation, thus Kujata server, also on Elemental DC, have begun to host overspills. With the World Visit system, you will be able to zone to another server within your DC, so the only thing you will miss out from not being on Tonberry would be being in a Free Company (guild) from Tonberry.
You will also find a smattering of English-speaking players across Gaia and Mana DCs - I myself am located on Masamune server, Mana DC.
Hope this helps.
EDIT: Added more information.