Hey bro,
If you want to try some Aanvar and stay conservative with the cycle, a simple cycle of 40mg ED for 6 wks would show some results but you are not going to gain 10-15 lbs of muscle! I'd expect some strength and inproved lean mass. It would be good for increased performance but when the cycle is said and done, 10 to 15 lbs would be a lot to ask. If you want to make gains like that, you're more likely going to want to do an injectable test cycle. Acne is more likely to be an issue with test, but there are ways you can control it. Low doses and consistent shots go a long way. Do a search here on the Q/A for "Acne" and you'll find a lot of info that I have shared over the years with others that have had acne problems.
If you want to make those gains, and have your diet nailed, here is how I would suggest cycling test for a first timer. At your size, you should be able to put on 20 lbs and hold 10 lbs after you come back off,
1-12
Test cyp or Test E 250mg EW, split into 2 shots a wk
adex .5mg 2x wk
PCT starts 2 wks after last shot. 1 wk of clomid 100mg ED, then 2 more wks of clomid at 50mg ED