Welcome to the world of T/C! I hope you enjoy yourself. Come May, I'll have been shooting T/C products for 40 years, and it's been a blast!
Since you are not experienced with pistols, particularly of this type, I think you will have to experiment some. Here's what I would do: I'd mount the scope with the adjustment knobs centered between the rings and then I'd go shoot some. After you've settled on what type of hold you are going to use, i.e. what feels comfortable and what works best for you, then you may need to move the scope backwards or forwards. A fact to consider is that you'll have less eye relief on higher power settings, as well as less field of view, of course. A common mistake a lot of shooters make is keeping the scope on its highest setting. You should carry on the lowest setting in case you get a shot that is close. If it is a longer shot, there is usually time to adjust the power of the scope and seek a good rest.
Good luck!
RonF