Most people here would admit they couldn't shoot a bow as heavy as yours accurately at 20 yards. Some people can, but from what I've heard most, certainly including myself, are MUCH better with lighter weight. Also remember that if you do drop poundage you will need to adjust arrow spine as well.
With the right bow and properly matched arrows, and 6 months additional practice, you might just suprise yourself on how confident you can become. Even then, it will still be up to you to figure out tha maximum range you can cofidently hit what you are shooting at. The distance will certainly be less than your compound.