Absolutely no need to feel that way. If you were the "worst" snake owner you wouldn't be here trying so hard to give this snake a proper home. In a perfect world you would have done all this research beforehand, but many don't and with some help their husbandry and their snakes are just fine in the end.

Your temps are a bit off as you will see by the caresheet so that needs attended to and an Acu-Rite to get a real fix on temps and humidity would be an immediate thing I would think. Not only to get that fix but also to help you to worry less if you know at a glance exactly what her environment is doing.

Even if her shed goes wrong it's fixable. See the sticky re bad shed help for a perfect walk through on that (thanks again Christie!).