Good for you and the choice to keep your ethics. Honestly, most of my shots are rarely over 15 yds and on average, 17yds is what I take deer at. I have taken a couple deer over 20yds, but it was one of those days when I knew I could make it.
Start out chasing small game until you get comfortable. Being such a small target, either you hit it and have a clean kill or completely miss. Bowfishing is another good one for building confidence.
Traditional gear is certainly a close encounter game. When I made the switch from a compound, it was hard to keep myself from trying those 25-30 yd shots that I would normally be able to take.
Learning to be patient and wait for those close shots will make for a heart racing experience unlike anything else!!! It will also make you a better hunter IMO, because your stealth has to be top notch.
Keep practicing, hopefully we get to see some critters on the Highlights section this fall!! You still have a few months to practice too and could be proficient if you stick with your recurve and put the wheels away for a season. Give it a try, you might be forever hooked.