You should start by doing a whole bunch of research. A good place to start is here: https://growweedeasy.com
Then you'll be better equipped to come back and ask specific questions about your grow, or any problems you're having.
That site will help you get started in the right direction. I usually also recommend picking up Ed Rosenthal’s Marijuana Growers Handbook. It’s a huge book that I found so much easier to understand than a lot of stuff I found online.Thank you , appreciate it