For a first time, Iβd keep it simple and not buy too much at once. Start with a small amount, choose something mild, and avoid mixing too many products until you know how you react. If youβre buying from a legal shop, Iβd ask the staff for a beginner-friendly option rather than going straight for the strongest stuff.
If you want to save money, don't buy too many boosters at first. Basic nutrition + stable environment is quite enough.
I started directly with premix soil and it was much easier. Then you can gradually add coconut/perlite.