Sounds like you are basically able to pull and shoot the bow, but don't feel comfortable with it and can't hold it at full draw very long. Also, if I understand correctly, you have just recently began shooting trad bows.
If you plan on hunting, the bow you have should work out fine for you, in time. You should draw the bow a number of times a day, whether you shoot any arrows or not. Draw and hold as long as you can until you can hold for 10 seconds. Over time, I would say no more than a month or so, you will develop the necessary muscle coordination you need.
You won't progress as fast in your shooting skills with this bow as you would if you had a 40-45# bow to practice with, simply because you could shoot a 40-45# bow more times before you get tired, and the lighter weight allows you to experiment more with subtle changes in form until you develop the form that works best for you.
So depending on your interest level and budget, you might want to consider adding a 40-45# bow to your collection.