I believe Clown fish are more suited to an aged, stable, more mature tank. I have been considering SW
but atm I am holding off, so much to learn! Anemone in very established mature tank if you were wanting one with your Clown although I understand they don't have to have one.
Starting small may not be best. Starting with easy to keep creatures would be better. The larger volume of water means little problems aren't as drastic or as big of crisis and you have more time to catch a problem before it will wipe out your tank.
Happy fish keeping. Please do tons of research, and asking here is perfect, there are many really great people to help along the way. (reason why I am not doing mine right now, lol)