I guess the first thing I would ask is how long have you been shooting?

When I first started I wondered if I would ever hit the target at 15yds...... And after 6 months, I can keep all my arrows in the kill zone at 15yds.... I can keep 80% on average in the kill zone at 20yds. As such, my effective range is 15yds...... Hopefully I can extend that during the season.....

Only you can decide what is good enough. I personally think you owe it to the animal to only take high percentage shots.

I will recommend Rick Welch's Volume 2 shooting video