You sound like you know what your talking about. I've just got a membership for a gym however I've been doing research on how to gain size etc etc. Too much to comprehend...
I was just wondering. What kind of routine should I begin with? MON, WED, FRI?
Do you have any videos/site you could recommend.
What about eating plan?
Just a bio about myself. I'm 65kgs and 180cm tall. I believe I am defined as an "ectomorph".
Putting on size is extremely simple. It very much boils down to calories in versus calories out, complimented by protein intake. So, simply put, if you consume more energy than your body needs to maintain its bodyweight, you will put on weight. The larger the surplus, the larger the amount of weight you put on. Generally the adhered ratio of protein:bodyweight is 2 grams per kilogram of bodyweight in order to maximise muscle gain (more on this later). Judging by how skinny you are (I'm several inches shorter and about 5kg heavier and I'm not particularly fat), you don't need to worry about bodyfat at the moment. Calculate your Basal Metabolic Rate (BMR; google 'BMR calculator'), then add 200-500 calories to that and eat within that range. If after a fortnight or two of strict adherence to this caloric intake and you haven't gained weight, increase it. You will gain weight.
Routine I suggest? Starting Strength. There are different variations of it, and you can tweak it and mess around with it as much as you want because it is your routine. Go to this link:
http://startingstrength.wikia.com/wiki/The_Starting_Strength_Novice/Beginner_Programs and if you're lifting for 'aesthetics' or for hypertrophy (the same thing), I'd suggest the program that alternates chins with deadlifts.
If the description doesn't make sense, the template basically works as you have an A day and a B day. It works like this:
A day:
Squats 3x5
Bench Press 3x5
Chin/pull ups 3xF (if you can't do that many, you can use the assisted chin/pull up machine)
B day:
Squats 3x5
Overhead Press/Military Press/Press (all the same movement, just different names) 3x5
Deadlift 1x5
and you follow it on a AxBxAxxBxAxBxx basis. So you go to the gym on Monday and do A day, rest on Tuesday, go to the gym on Wednesday and do B day, etc.
I recommend you do your own research on this stuff, it will benefit you greatly. Another recommendation I'll make is that it is absolutely imperative that you get your form down properly on these lifts. If you don't, I guarantee that you will injure yourself in some form. Watch videos on youtube, read the book Starting Strength (you can pirate it, but I think you should buy it), practice, record yourself doing the lifts and compare with other videos.