Hi @getglass
Welcome to GN and your journey growing cannabis. Have you got any thoughts on what you are going to use. I can highly recommend Ventana Plant Science Nutrients. A fair amount of our growers use it for good reason and it also comes in a complete package, for the full plant cycle.
https://growershouse.com/ventana-plant-science-complete-nutrient-line-kit-quarts
If you do a quick search you will see many growers on GN using the range and lots of easy information to learn about plants and nutrients.