(Research fish before purchasing). Know what you want and what the fish need before buying them. This will pay off greatly in the time ahead when your fish start to really grow. Ask yourself questions. How many make a healthy school Do they need caves? What types of food do they need? How big will they get? How aggressive is this fish? Will it eat plants? What temperature do they like?
If you just can't decide ondesign or fish then let me help you get started. We can look at the surroundings and create a masterpiece or just a simple plan. Mistakes can be costly so do it up right the first time.
Let me help you have an amazing aquarium that you can show off to your friends. They'll be incredibly envious!