it's good that you have a goal in mind. try not to overthink "training variables" or get anxiety attacks over a calorie surplus. it sounds like you're completely new to lifting. learn correct form, respect the exercises, don't injure yourself through overtraining, and be consistent. no excuses, especially in the beginning.
oh yeah, never compare yourself to actors or famous/wealthy people, at least not in a serious, earnest way. these people can afford personal, professional trainers who can basically plan out every aspect of their lives in order to ensure gains. and, yeah, the question of steroids will always be out there for some of these people. remember the Christian Bale before/after pics?
yeah, sorry to say but that won't be you after 1 year or probably even way longer than 1 year. us peasants have to rely on patience and dedication. don't compare yourself to these people.