10g betta tank

I am looking into acquiring a 10 gallon tank for a veiltail male betta but have never worked with a fish tank before. Does anyone have a basic set of steps and things I need to set up the tank for my fish?

So I've had this tank for a while, but recently the goldfish I had in it died after it's mate did, I was wondering how many Cory catfish and betta fish I could put in it without it being a danger to any of them. The tank does not currently have gravel but it does have a heater and heavy duty...

 Well, we all knew it would happen, and it finally has... yesterday I brought home a delta tail betta. His name is Faukes, and he is magnificent!!!      I was currently using my 10g to breed my black venezuelan cories, and then it occured to me, oh my goodness, I could totally put a betta in...