Your diet will determine results. You likely will gains 10-20lbs, just remember that weight gained and muscle gained are very different everybody gains a lot of weight on a cycle but when everything's said and done you should hope to keep about 25-50% of that weight gain. All the rest of the weight is mostly glycogen and mineral storage. That's why someone on steroids looks different than another person who's not on steroids even when they're the same weight and the same body fat percentage. There is a cosmetic effect to being on anabolics.
When you hear stories of guys gaining 20 lb in 4 weeks and then losing it all in post psychotherapy they did not lose their gains, they weren't gains to begin with, it was just a cosmetic effect. Building muscle takes time and calories.
If someone really gained 20 lb of muscle in 4 weeks, that would mean that they were in a excess 3000 calories per week surplus and every calorie went to muscle growth.
And even if that did happen, a muscle is only about 12-15% contractile muscle tissue/protein. and the rest is also mostly water.
The only reason I'm saying any of this is just to give you a reasonable expectation of what a cycle will do.
Also if you don't have very specific goals that call for a short term boost in strength or a cosmetic effect for a show, skip the orals all together and go with EQ or primo on your second or 3rd cycle (with test of course)