Taking care of fish is actually pretty easy once youget the needed know how. Just follow the advice you get here and start slow and you shouo\ld be fine.
As for cycling a tank with fish, Danios, I think Zebra danios are recommended most oft he time as they are very hardy. I thikn a good ratio is 1 for every 2 gallon so that the cycle is complete and will support other fish. If you are adding other fish after the cycle is done and want tokeep the danios then 1 for every 5 gallon will wroki but you have to add fish slowly.
Have you ever considered a FISHLESS CYCLE