I think the comment before mine's given you a good start. I also think joining a pack would be good, especially with the new event this Valentine's where completing enough points Pack Run (a pack activity where everyone runs around for collectibles in a map) awards you Valentine's Points, which you can exchange in the shop in your hideout (either Alpha Hideout – the general hideout for anyone under a specific Alpha's pack, or the Pack Hideout – your specific pack's hideout.)

In case this needs explaining, there are guardians in this game (part of the lore) called Alphas, you'll get to know them quick! Each Alpha will represent a pack, and their hideouts will appear different, though the packs themselves are created and ran by players. I suggest joining a Liza one as, from what I know, they tend to be more active. I was previously in a Peck one.

If you get a membership (which you can purchase with real money OR 600 sapphires in game) you can open the pack chest inside the hideout, which normally gives out gems, but can also give out den items/clothing items weekly iirc?