MI’ll give you the quick-ish version. I wish I’d known some of these when I started.
If using ffof soil the plants rarely need nutes until the second month of veg. Just water them with water pH’d to 6.2-6.8. If it’s municipal water with chlorine be sure to let the water sit out, open, for at least 24hours. Ps. Chloramine will not off gas, only chlorine. Get decent pH meter!!!
Make sure you test the pH of your mixed nutes before you feed the plants. Aim for pH 6.2-6.8. Use pH up or down to adjust. Some people use lemon juice or baking soda. Ymmv.
When feeding, pour 1/2cup pH’d water/ gallon of container size around the perimeter of the plant and let it sit for 5-10min. Then Slowly add the nutes until you see about 10-20% runoff from the bottom of the container (make sure there are plenty of drain holes). Let runoff sit for 5 min, then remove excess. This may require a gallon or more /plant. You’ll have to judge how much each requires.
I test the runoff (pH and ppm) to keep track of where my soil/roots are.
Don’t forget to flush according to fox farms schedule. The plants will need it. You can use their sledgehammer, or florakleen, or shitloads of fresh water.
You can start out at 1/2 or 1/4 strength nutes for the first few feedings. I fed about every 3-4 days, depending on the plants needs