New to the game, had a couple questions

Hello gents, just a tourist here

Been eyeing up the game for a while and wondering if it's worth my time.

1. Is it easy to get new characters? Is there a way to grind them out without paying money?

2. Is there big fomo?

3. Is it easy to get into? Is the combat fun?

4. Is the story compelling or just kinda there?

5. Is this safe from getting shut down in the near future? I'd hate to put hours in for it to crumble.

Thanks to anyone who takes time outta their day to answer, appreciated