Ok, So a goldfish is out, Are betta easy to care for? they look so pretty! Are they ok in pairs or would you suggest only one for my size tank?

Thanks for the info everyone.. I dont want to cause any suffering to any animal so thanks for being honest about the goldfish!

I got to go research on Bettas now

Another question quickly! In the way future if I decided to get a bigger tank with goldfish could they mix with bettas? I would seek advice from you guys the next time!