First off let me warn you, theres alot more to worry about than what you just asked. I don't know if you realize that on adverage a female will lay 20 eggs, all expected to hatch. She will not drop the eggs unless she has a good digging spot (lay box). You cant house all 20 in the same small cage, thats horrible. And you should look into what it takes to feed a little pooper just so your ready. And if i where you i would set aside about $100 emergency cash just incase you need to get a new heating supply or more food or something and your short on $.
Now that i have kind of warned you.....i will help you out.
No you don't have to brumate nor can you force a dragon to do that.
Temps are about 80F, you should double check that because there are 100s of forums covering it.
Humidity is finnicky, you have to observe the eggs to get it good, eggs too soft take some away eggs not soft add some, super small incrments.
You can breed at 2years old but make sure that they are of similar size. If your male is 5 inches too long he may have a bit of touble gettin up in there. ( i have personally witnessed this and is was so sad lol, wasn't my dragons for the record )
Last but definatly not least I AM NOT AN EXPERT. I mostly just wanted to test my own knowlege as i do in many cases here on BD.org. I didn't look any thing up to refresh my memory so double check my answers. Cal;l it homework, do it, love it, and learn all you can because you don't want 20 dieing babies on your mind. No one wants that.
Good luck my friend, and may i ask what expo are you attending?