If you think your putting on too much fat then simply cut back abit.
If you don't have trouble putting on weight then you don't need to eat everything in sight.
Set thing I've done is set myself a basic diet plan, doesn't have to be stable or bland, but something whereby you can monitor your macros and get an idea of what your body needs. I use
www.dailyburn.com and record my days worth of eating probably 3-5days a week depending where I am. Then weigh myself about twice a week, first thing in the morning too.
You can enter your current weight, your target weight and estimated bf% and it'll tell you how much you need to eat.
I think my suggested ranges were 3200-3400cals and that was to put on 2-3lbs if I remember correctly. And it worked, a few months on I'm still eating between those ranges and my weight has stalled as it should.
So now I know what the 'maintenance' calorie requirements are, and if I wanted to bulk now, simply add 3-400 extra calories a day.
Again, you don't have to be anal about it, but it helps in the early stages so that it gives you a better understanding of what you put in your body and how it effects it
I would try and explain those 3 exercises but it's probably easier to just google them. Pretty self explanatory once you've seen some pictures. Rear deltoid laterals however are just like your bog standard side raises for your shoulders, however you do them bent over (seated or standing) and raise your arms up as you would with a normal side raise. The angle of your body then means your hitting the upper back rather than medial deltoids.
Hope that helps bud!