Welcome back! If you haven't logged in for a while, check out Personal > Dashboard, and you should have a few unclaimed loyalty boxes, one of which the option gives you a pet slot ;) That can give you a nice start.
You can get a rough idea of the CSC converstion rate with shop search of the cards 100, 250 and 500 are the ones that will be on shop search, the prices do fluctuate a little, but it gives you more or less the idea.
If the number seems overwhelming, don't worry - quests were revamped and they're pretty quick and simple to do now for a fair award, it shouldn't take too long to earn :)
Useful Links:
What to do on Subeta? FAQ Useful general information for newbies Finding friends (Chit Chat) SubetaLodge (Offsite item database, pet colours etc.)
2025 Stalacbite, Focused (7)