If you have never had fish as a pet before the best kind IMO and I am an experienced Aquautic pet owner is to get a 10 gallon tank and buy 2 male and 2 female guppies , a gold fish and 2 male and female Mollies. They are easy to manage and they also breed by having live babies. The goldfish isn’t classified as a live bearing fish but the guppies and mollies are. You can start with 4 of each type and within 6 monthes you will have a decent size school of pets. They do breed fast because when they mate the male impregnates the female for 3 – 4 terms at a time. If you don’t feed them well though, the males will eat the babies as they are born so make sure if you decide to go with these types , when you expect them to have their babies you feed them a lil heavy and have some REAL green floating hydra plants for the babies to hide in.
If you have any questions about this type of fish
(LIVE BERRING FISH)
I know all there is to know as I used to raise and sell them to a Pet Store.