It's a wonderful bug to catch! Take it from someone that has had that certain "sickness" for over 6 decades It sounds like you have done things just right so far, building practice sessions and dedicating time as much as possible. Also, practicing from elevation is one of the things I stress to most every new archer since most bow hunting is from tree stands with the occasional ground blind or stalk thrown in the mix. Come spring, take a chair outside with you and practice shooting from seated position from your deck and from the ground as well in case you decide to hunt from a ground blind. Many times I have had to shoot from seated position because I would have been busted trying to stand. You know how them old wiley bucks can just appear at 20 yards from nowhere and not to many ground blinds made that my 6'5" frame could stand up and shoot anyway

As far as broadheads go, there are a ton out there that are good and a good few that are excellent. G5 Montech fixed broadheads and Slick Trick standards are my 2 goto heads. Neither have ever failed to put meat on the ground for me as long as I put them where they are supposed to go. As long as your bow is tuned well, they will both fly dead on even with your field tips and they both do a ton of damage as many on this forum can tell you. I tend to stay away from mechanical broadheads basically because they are just something else that can go wrong and with archery, anything you can eliminate that COULD pose a malfunction you want to.

One last thing, get yourself a quality range finder. Even after the many years I have done this, I can still estimate wrong in that heat of the moment. Crap happens so if you can again eliminate a malfunction (your own brain goofing up a yardage estimate being the possible malfunction) then do it

Welcome to archery and may you have many wonderful years in our beloved sport!