You might want to have a look at this site. Contains many guidelines and FAQs about fitness. I started going to gym about 1 year ago but was doing the usual split (arms, chest,shoulders,legs day split). To be honest I wasn't very serious at the time and didn't have much progress. 2 months ago I decided to get serious and decided to follow the PPL(Push,Pull,Leg) program. Followed the program strictly and watched my diet, being diciplined and whatnot. Made great progress so far.

Remember though, be discipline with your diet AND watch your form, a good lifting form > heavy weight. Hope it helps!
https://www.reddit.com/r/Fitness/wiki/index