Welcome to the show. This is a great group of folks here. I have learned much and I learn more every day.
Spend some $ on a good light.
Get a ph pen.
Read this:
There are so many other great journals by other great growers.
I to like to “putter” with things. Because of this, the best advice I got from these great people is to leave them plants alone and let them do their thing. You plants will let you know if they are unhappy.
Happy gardening!