If you could before surgery, you should be able to afterwards. At this point you shouldn't worry about it until you get close to 3 months as you are still pretty banged up down there.
In short, your glans (tip of the penis) was relocated to your clitoris. With modern surgery, it should be as sensitive if not more sensitive than your original equipment. If you think sexy thoughts, you should have a feeling much like an erection. This will tell you that it's all in place and ready to be used when it's time. You will need to be sexually excited for things to work properly. This requires proper foreplay and when you are ready, you will feel a warm glow all over your body. At that point, experimenting with your clitoris should produce results.