I'm personally a huge advocate of stronglifts 5x5...
You're here, which is great, but to be honest, you're going to see a lot of different opinions, training styles, and supplement regiments here that are definitely not for beginners
That isn't to say you cannot take value from them, but that at different points in a persons gym life they will need different programs to get results.
Right now all you need are the following:
An understanding of macro nutrients and calories.
A progressive resistance program that teaches you the big lifts that will bring you the biggest results
The mindset and attitude to wait and grind and get results even though you do not see them in the mirror for the first few weeks.
These are the principles that will set the sail on your ship, so to speak, in the right direction.
I am on mobile and haven't been around fitness discussions for a while so I don't have any nutrition basics for you, but for now get myfitnesspal on your phone for free.
Secondly, go to stronglifts.com
Third, if your gym has a real trainer that is adept at training and teaching
- military press
- bench press
Then hire that person and learn these.
On an extreme budget, use the videos stronglifts provides to teach you. Better having a real person show you though.
Btw, you don't need that person beyond learning these basic lifts.
This of course is all my opinion and you feel free to disagree with me I guess.