Do you have a test kit you use and like?
we had one we picked up from Walmart, just due to convenience. It seemed to work ok. Didn’t really pay much attention to the name - so I don’t recall it.
One of the best deals for your money is to contact your extension agent for your county and get a really good one that way - depending on what you want. The extension agent can give you lots of tips for growing in your particular area- soil and climate etc.
The extension office also has lots of free info much of it is on the internet now. Just do a search for your state universities’ extension service.