Okay right off the bat your diet is going to be the biggest thing holding you back. I’m sure you don’t need any protein powders or supplements yet…
You are going to want to bump up your meal frequency to eating every 2-3 hours. That’s going to mean between 6 and 8 protein-centered meals every day.
In order to gain muscle you need to steadily gain bodyweight, and most people want to aim at gaining around 3-5lbs of bodyweight each month until they reach their goal (do you have a more specific idea of what yours might be yet? 200lbs? 215lbs?).
Increasing meal frequency allows you to get in more calories and nutrients, and it keeps your body in a physiological environment primed for growth, rather than having large gaps between meals which isn’t ideal for recovering and building bigger muscles.
As far as your workout you will probably want to start working with more basic exercises and training with more focus and simplicity.
The most traditional and basic of the bodybuilding exercises are:
Barbell Flat Bench Press
These are the exercises you want to center a routine around. There is a place for cables and machines in some routines, but most beginners are usually better off avoiding them in favor of training with the freeweight barbell exercises, and then having one or two secondary exercises for each muscle group (or zero, depending on the routine).
If I were going to recommend a routine to you it would be a pretty typical pull/push/legs type deal. Here is an example of what that might look like:
Deadlift 3 sets of 5-8 reps
Barbell Rows 3x6-10
Pullups 3xfailure or as many sets it takes to reach 50 total reps.
Barbell Curl 3x6-10
Dumbell Curl 3x8-12
Bench Press 3x5-8
Incline DB bench 3x8-12
Military Press 3x6-10
DB Lateral Raise 3x8-12
Close-grip Bench Press 3x6-10
Lying tricep extension 3x8-12
Back Squat 3x5-8
Leg Press Machine 3x8-12
Lying Leg curl 3x6-10
Leg Extension 3x8-12
Standing Calf Raise (either on a block using a smith machine, on a standing calf machine, or using the leg press machine) 5x8-15
Not at all set in stone, and it’s just one idea of countless ways you could go about this. Some people here will recommend fullbody workouts 3x a week, others would have you split up your bodyparts even further than this and train w/ more frequency.
The best thing to do is to start with something that has you working hard on the basic exercises so you can figure out your own recovery abilities, because that is whats going to determine how you train more than anything else.