The pro shop can help you tune it, but they can't do it for you. You need to be behind the bow so it is tuned for your quirks in form. Everyone has them.

Yes, a bow can be tuned for field points and need to be retuned for broadheads. But it should be tuned for both.

I used to be one of the many that would tune their bow for FP's and then have to retune before the season for BH's. This usually meant adjusting the sights so the BH hit where I aimed, but the FP's would then be off. I got tired of this and from asking many questions of the great guys on this board, I can now tune both the FP's and BH's to hit in the same spot and don't need to go through retuning before I head to the field.

Again, get a copy of the Easton tuning guide, it will walk you through every step and you can do it at your house and not have to make the trip to the shop.

Good Luck and let us know how it goes