If you have a a gym membership I would recommend not wasting on on doing a few exercises of 100 reps lol. In order for me to set you in the path for a good routine there's things you need to take into consideration.

1. Your goals (Ex: Muscle hypertrophy only, Muscle strength only, both etc)

2. Your schedule (It's hard to set upon routine if you don't know how many times a week a person can hit the gym)

Now, what you want to do is calculate your tdee using calculators. This will help you estimate where your maintenance calories are so you can gain weight. After that you can download myfitnesspal and track your macros and calories in order to gain weight. For bulking I would keep protein at 1-1.1g per lb of bodyweight. Carbs and fats should make up the rest but I like to keep my carbs high and fats at a medium. Don't fall into the trap of buying a lot of supplements as you can get most from food. Only thing I would recommend getting IF you really need it is whey/casein protein and creatine. BCAA's have been proven to have little effects and pre/post workout isnt the healthiest option imo.

Here is a link to my thread ,

Forums/t=7715876/beginner-guide-t...hread.html