If it's your first scope mounting and you take care, you should have no problem. Most important is to get clearance under all parts of the scope except for the two mount contact points , make sure your bolt handle is clear through its whole travel, fasten all screws sufficiently to eliminate recoil induced movement. Bore sighting with a device is over rated. Set a target at 25 yds on a large plain paper 2' square, shoot, move your reticle accordingly. Then place your target at the distance you wish to sight in for and do the fine adjustment.
After mounting and sighting your 1st FA, confidence will build. However if you needed to ask this you may want to consider having the service done.