By all means, you should take it to a pro shop and have it inspected for safety reasons. It will certainly need a new string.

Longer term, my advice is practice with it a lot, try it hunting for a year or two. After that, if you think you'll stick with bow hunting you'll probably want to invest in a new bow. They have come a long way in 20 years in terms of being quieter, faster, more reliable, and easier to shoot. I recently bought a new one after having used my old Browning for over a decade. After shooting a new bow, I wish I had upgrade a long time ago. You can buy a really decent bow for $500-700, completely set up with good sights, rest, etc.

Welcome back to the sport! Good luck hunting.