With HFT you will find that almost everyone wants to help and has all the time in the world for new shooters. I've only been shooting a year and learnt so much by going to clubs and talking to people.

Back to the scope height question, have a look at the second to last graph on my latest blog. That is a slightly exaggerated example of how scope height can affect trajectory. But honestly I wouldn't worry too much about it until you have done a few shoots and have worked out where your shooting is strongest/weakest. Then tailor your setup to suit

LINK HERE