Welcome.
When I see an enclosure measured in gallons, I presume that's a fish tank. Fish tanks are pretty troublesome enclosures for most snake species, especially snakes like ball pythons that need pretty close control of humidity and temperatures. I recommend a commercially built PVC enclosure with a radiant heat panel and a Herpstat thermostat. Starting with appropriate equipment makes success more likely; BPs are potentially challenging snakes even with a good setup, and using enclosures best suited to other animals will just be adding a weak link in the chain.