Okay I am a noob myself with cannabis. Well not quite true as I grew some in the '70's, but cannabis has changed a LOT since then. Still I have a bit of a green thumb with most plants... except cacti.
I know that a lot of people swear by hydroponic grows, but soil growing has been proven for centuries. No offense to the hydro folks.
The main thing is to start with GOOD SOIL Either buying it or mixing it up yourself. You didn't state( or I overlooked it) what kind of cannabis you have. Some take a finer touch tbh.
Composted soil is pretty hard to beat, because you can use it over and over again assuming you take care of it and use natural stuff on it. Use chemical fertilizer and that will put salt in the soil which is BAD, really it is.
Soil should have fairly good drainage, but not too much. The reason I say natural soil is because it will have living things IN THE SOIL that will protect the PH and the roots. Roots are the heart of the plant. They pump everything needed to the rest of the plant, except CO2, and sunlight. The leaves are the lungs for the CO2, and the skin to soak up the sunlight. Stems are the bones supporting it all and holding it all together. The roots drink the water and nutrients. Kinda like Gatorade for us. Not enough and it will die. Too much and it will drown. This is why the stuff your soil is made of is so important. It has to be the right mix for the plant, regardless if it is cannabis or tomatoes or cattail.
If you have "living soil", you shouldn't have to worry too much about the PH, assuming that it is the right PH in the beginning, the living things keep it in balance for that plant, that soil, that water environment.
Some people call it "organic" , but it is just natural. If you have everything right from the beginning, and it's an "easy keeper" plant ( good for beginners) then you shouldn't have to do anything but water. Not too dry, not too wet, and you should win the contest.