Good of you that you have found this place, PHEWW..
Well, maybe your overall goal is to GROW..You need to eat like crazy. I think that Tailor made nutrition is not for you. Search for the Massive eating article.
XEXE. Don't worry about too much weight. There is no such thing, especially if you'r a beginner. Just lift hard and with good form.
About the arm size. LOL. If you'r 12X lbs, you'r not going to get big over night. BIG arms are hard to get. It takes a long period of bustin' you'r ass in the gym. And I'm not talking about months but years.
If you include PWM, that's four meals and I'll bet that you can squeeze one more meal. Five meals a day is a good start. As you gain weight you're going to need more meals. Just try to have protein in every meal. At least 50g.
It count's as a meal and you should dring it after you'r workout. If you have carb-protein shake than that's Ok. If you'r shake is just P. than I recomend that you get some simple carbs like glucose and add it to your shake
I don't thing that losing fat is in order. You need to EAT boy. EAT. Abs on a scrawny body are, and I repeat, are not good thing. Cardio OUT.
At you'r weight, It's EVERY meat in your dictionary and plate..
I would go for the basic 8 reps per set. And I would not go untill failure. Just watch for your form, breathing ect. untill you learn to lift right.
Please NO. You could take a picture and NOT share it with us but save it and then in a 5 or 6 months take another picture and then post both of them.