I'm an ecto like you so I don't train as much. I train 3 times a week, I do 4 exercises with reps from 4-8, heavy weights, compound. If I'm taking something then I'll do 4 times a week. Ectos need to train 3x's as much as a meso to gain muscle but with our skinny frame when you got tons of muscle covering it it's the coolest looking thing assuming you have low body fat. My wrists are so small but when you go higher my arm gets bigger and I love that. Took me a long time to build some mass but I was on and off of programs. I'd do it for 1 month then school got crazy or girlfriend complained. I started a few months ago, got all my strength and gains back quickly but been consistent since, haven't missed a meal yet. I read about German volume, I don't know if you need that being an ecto. What does it consist of?
Yeah the cottage cheese thing gets use to but it's probably the best meal you can have, it's easy to down(again when you get use to it). I'm telling you you'll love it because it's quick an efficient, just don't bite on the cheese and down it with the water, mix it in the mouth until it becomes soft and chug it down. I cup is good enough.
Another important thing, don't expect gains right away. If you just started expect them in 2 to 3 months to really show, 5-6 months to see drastic changes assuming you're consistent and jump over plateaus.
To be honest I started working out 4 years ago. But I think only now am I really starting to do it properly. All in all, I do love being an ectomorph because while you do have to eat to the point that it's a chore, you are pretty much always toned when you put on the muscle (at least from personal experience...maybe I'm way off).
I agree with the seeing results comment. It takes a lot of patience.
As for German Volume Training...well there's a great article on this site by Charles Polliquin. It basically consists of compound movements (good for ecto like you said) and lots of volume. The beginners cycle is 10x10 reps for two main exercises and 2 supplementary exercises. So say for chest and back day you could do:
10 x 10 Dumbbell Incline press
10 x 10 wide grip chin ups (I can't do 10 of these with the tempo GVT calls for so I sub bent-over rows).
then 3 x 10 flat bench dumbbell flies
and 3 x 10 one arm db rows
After that you switch to the intermediate level at 10 x 6 with the same idea of one main exercise per body part you're working out and compound movements. There's also GVT for the advanced trainee. Anyways, the article explains it much better than me it's in the workout section of the site.
Personally, I've gained 11 pounds in the last month using GVT. Eating has improved a bit so that's a possible confound, but ultimately GVT has been very effective for me. It's really hard though and not much fun (especially leg days)...very sore today.
I'd def. recommend it!