My body blog..please read!!!

I took a month off, had to hurt my back some. Then got sick, damn winter. But I started back this weekend. I just did some cardio and ab work to get me started, ease into it some. But I did start my new shake: Cytogainer 900 calorie Chocolate Shake. I need to increase my calories and protein. I also need to stop doing so much cardio and life more. I want to go from 136 to about 175lbs. Not sure what a realistic time frame is for that, but I am gonna stay with it. I dont want to be the skinny guy in two months when the pool opens. I would like to take my shirt off without feeling self-conscious and maybe have some people look at me for my bigger body

Guys if you have any tips for me or want to help me stay motivated, please let me know. I could use some help with chest and arm exercises to help me gain some size.