Also depends on what kind of fish plan to keep.
A Biotope style tank
I would browse some stores' fish aquariums, especially stores which are owned by local people who love the hobby. Check out the types of fish which you are most interested in keeping at your home. After a few visits to stores you will likely see certain fish which draw your attention, again and again.
Then you will know what those fish need for space and tank mates.
Take your time and research and cross check what the fish you like most need.
As an example - fancy Goldfish would be a wrong choice to pair with Discus, the first preferring cooler water and the later loving warmer water.
You can further create a lovely tank using appropriate fish companions, with various shapes, and colors and locations where they like to swim in the tank.
Example being top of tank, like Hatchet fish, upper part of tank like Pearl Gourami, middle of tank like Neon Tetras and Harlequin Rasboras, Bottom of tank like Corydoras and many Loaches.
Welcome to the community!
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?
Start here - Aquarium Advice Article
FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves