Hello, I just started fishkeeping last week and I really enjoy it so far, but as I read more and more about fishkeeping I'm beginning to realise that I'm not doing it right. I bought a 10 gallon fish tank from my friend, without much research, I poured tap water and turned on a filter for 3 days, then I went to pet shop to get some fish! I told a lady that I'm a complete beginner, and asked her how many fish I can keep in my 10 gallon tank. She told me 5 max 6. I bought 4 of them, 3 comets and 1 black moor. It's been a couple days now, and I don't see any issues related to health of my fish but I'm worried that it might not last long. What should be my next steps? How many fish and which species I should keep in my tank? I need a guidance, please .