You can yske s deer wit a 45# bow though like others, I will sayy that is a bit light. I don't know anything about you, but here are some things to keep in mind. Most compounds a few years ago were 50-55 and that was thought to be strong. The tech. keeps improving and for a bit, everyone and his brother shot 60-70# bows.
Lots of shooters found 70 too much to pull so they would shoot at the low end of the range however bows are designed to be most efficient when topped out. What that means is, a 60# bow will usually be a little faster and quieter in the 50-60 version than in the 60-70.
You will move up but you should never try to hunt with more than you can pull and hold comfortably. For me, I could shoot a 70, but I have and shoot a 60 well and that is sufficient to kill anything, including Elk.
So have a good time and take your deer at 30 yards this year or closer, and work your way up to more power so you can shoot a little more bow in the future. You will find heavy tips are better for harvesting (125 Gr) but you should have more bod to launch them.