what do you... do, in this game?

i really wanna be interested in this game, but it just fills me with the issues i have with base singleplayer minecraft, so i have a couple questions

- are there any npc trainers or... npc people at all? marts, centers, pcs? replacements?

- what happens when you black out?

- is there multiplayer? (pvp?)

- how many mons are in here, how many legends in particular? (zeraora?)

- how often does this get updated?

- what if i suck at building? :(

- what do you do?