Just go slow after you plan.
You don't have to rush.
Plan wat you want to keep and where you can setup your tank..
After that you will know how big a tank you can have.
Wat type of tank you want? AIO, Shallow, tank with sump ,etc
Basic equipments for most tank is a skimmer ,light,chiller,return pump,
wavemaker.
Others can add as you go along.
Happy Reefing