STEP 1:
Decide on the type of fish you want. Different kinds of fish (fresh water fish versus salt water fish) require different kinds of equipment. Fresh water fish are easier to care than salt water fishes.
STEP 2:
Visit the pet store to purchase all the equipment you will need for setting up a fish tank. Make a list of everything you will need to set up a fish tank.
STEP 3:
Set up the fish tank. Place the fish tank in a good location. Add the filter, the heater, the gravel, the plants, the driftwood or decorations, the rocks and the water. Adjust the heater until the water temperature reaches a temperature between 75 to 78 degrees. Place the top of the fish tank on the tank.
STEP 4:
Make sure your fish tank set for at least a week before adding any fish. This will allow time for you to be sure the water temperature is set correctly, the filter is working correctly and there are no leaks in the fish tank. This will also allow the bacteria to start building a bacteria base.
STEP 5:
Select your fish. Keep in mind when picking out your fish, that you need to purchase fish that get along with each other. Also don’t buy too many fish. Purchase fish that are hearty, inexpensive,relatively small and ones that you want to watch for a long period of time.
STEP 6:
Maintain your fish tank. Feed your fish on a daily basis .Check the filter and heater twice a week. Once a month, check all hoses, fittings, clamps, cords, lights and any other equipment.

I would say there are definitely more to it than just what you have mentioned. Me and my father were involved in aquaculture for more than 40 years. I can help on any of your specific questions.