I don't remember the very beginning of JP FGP since I started later. The current ascension quests only drop what's needed to get to certain levels in the English version. It may be once the developers release more of the basic storyline they'll change to the typical missions that drop the higher level stuff.
Since it's two servers you should be able to play both on a single device - at one point I did that with Love Live. You can still grind away at the JP account as a main and in your spare time play the NA version to read the story.
Different servers so it's all new accounts, everyone will be starting off fresh, though it looks like the opening promo is Saber Lily so there is that.
For JP server, looks like Kintoki Rider re-run is on the way.
Fine, since Flutterz is shitposting, I'll do a smile protected:
So, I went for a Rinshtar pull, and ended up with Artemis... uh, Orion the teddy bear, I mean. I guess if I'm gonna miss getting something else I'd wanted is a good way to miss.