RE: 300 magnum
I wouldnt buy a 300 as my first rifle either. You may develope a natural flinch and keep it forever. You should get a comfy rifle and get used to it. A 308 or 30-06 is plenty of medicine for deer. 270 and 7mm are also. Maybe a 7mm mag would be a good choice for you. Look at remingtons sendero rifle.