Ok. Then you can get what you want and what's beat suited to your tank.
Just a couple of things you might not know yet.
Was the tank running with fish when you got it?
Have you read up on the nitrogen cycle yet?
You will need to buy a test kit to check parameters.
Don't wash the tank or filter out with tap water unless you plan on cycling the tank all over again.
If you are not starting from scratch, Leave some of old fish in the tank (to provide ammonia of your beneficial bacteria) until you are ready for the fish you want.
Weekly water changes will be needed, not monthly to keep your tank healthy.
Make sure you have a good dechlorinator for your tap water.