Welcome! If you're just getting started, I recommend you get samples of some of the different products around, including things you wouldn't normally consider. (For example, if you're a clay guy, get ceramics; if you're a ceramic guy, get some clays.)
You can enjoy the "dreaming" period and delay (but not avoid) the large cash outlays when you decide what to start buying!
Also, when you're ready, if you're going full custom, and you're not an artist, definitely engage a designer. Gets you to a better product, and more quickly. I have yet to see anyone say the money spent on the designer was their mistake.