Need help growing indoors

Hey guys tbh I’ve spend a lot of equipment on my first run thinking I was gunna pop off lol. Clearly I did not and have been struggling tbh I have 760w lights I’m using a 4x4 now wise an air flow machine my grow was doing well for a minute but I have listen to so many ppls advice and it gave me more probs than help lol . I will be starting new soon and I rlly wanna have a good run any one have any advice… which medium would be easiest and just over all help lol I do love growing but been having. Sm issues anyone know a good start to finish run I can do or just advice overall I wanna start a new run soon and I want all the knowledge I can get before starting again ! I will post start to finish if I get proper help !