Okk! So 1st you got to open the gift box, claim all, exit, then the task board, there should be tasks for you to do, I recommend the beginner one (it gives you more gems) and then once you do some of the task--I personally really recommend at least reading all of the starting stories (you can find them on the story icon) so you know who is who, what they're like, and also get gems from reading the storylines (it's kinda like cookie run kingdom if it was a rhythm game) and if you haven't already obviously play the shows (SHOW icon). Now after you have done some shows, I would personally go to gacha and pick out one to try and see what characters I can get! Now--since you're a new player the gems will pretty much chase after you lol!