Open or wooded areas? Barrel length and caliber are affected by this.

How long will be your longest shot? Keep in mind you don't need to be taking 300 or 400 yard shots unless you are extremely proficient with your rifle.

Where do you live? Size of the animal matters and some states don't allow rifle hunting.

Rocky or hilly areas? Will you do a lot of walking or hiking? Weight is an issue, more for some than others.

What are the caliber restrictions for the area where you live?

Will this rifle be used only for deer or are you going to hunt other species?

Are you recoil sensitive?

We need more to work with than your age and that you are hunting for deer.