Fitness beginner

Hey guys,20 year old guy here, normal body type. I've wanted for a long time to begin with bodybuilding (maybe I shouldn't say bodybuilding exactly, cause I don't want to do fanatic fitness or competitions but I really do want to have much bigger muscles). Now, I know it is kinda relative but does anyone have any experience with fitness and who has nice tips for how many times per week should I go, supplements, etc?Thanks a lot and hi from the Netherlands