Fair warning, my post is probably going to be pretty tame in comparison to what more senior members may come at you with. First off, it's very admirable that you've set goals as that sets you apart from the majority of the population. However, you do realize that your goal of 25-30 lbs of "muscle" in the next 4 months is basically unattainable?
You may be able to get near that amount in total mass gained, but it certain;y won't be all muscle and it will require a large daily surplus of calories consistently. Also, I hope you realize that 180 lbs at your height would still leave you looking rather small. Perhaps that's the look you're going for, but in your words "I wanna gain more muscle though and get absolutely ripped." and this won't be the case given your goal weight and current height.
You've already stated that you're afraid to add calories for fear of it interfering with your drinking habits and ultimately causing you to gain excess fat. What you consider a lot of food is probably a relatively low amount by the standards of most on this board and even with that, I highly doubt you'll be able to consistently shovel down food without your fear of becoming a fatty taking over again.
Like many will suggest, down a gallon of milk a day, see what kind of effect this has on your body comp (assuming you've already increased your daily caloric intake) and adjust from there.
On to your training, you're going to train your legs in a half assed manner, completely neglect your back and shoulders, and train your mirror muscles 3 times a week? Find a beginner program (many are on this site) and stick to it.
Your entire post reeks of "please spoon feed me" which no one will. If your sincere about all this and are not a troll, I suggest using the search function and the great resources this site has to offer to help you along the way, bext of luck.