Hello @Macbeth and welcome to our community forum where you can connect with some of our 100,000+ members to get some reassurance from your questions.
This forum is full of helpful sitters and owners who I’m sure will jump in through the day with some answers to your questions, so for the moment, I’m going to leave you with a link to another post that you might find interesting, which also identifies some of our snake loving pet carers!! Tell us, how long can a corn snake grow to? I actually have no problem with snakes at all, but as yet we haven’t added this to our list of house sitting pets! Our encounters have all been in the wild 
In terms of memberships, each of the standard and premium memberships offer different benefits over the basic level all of which is shown on the pricing page, but @Lucy-B will be able to advise which is the best for you when she comes back online later today if you still need more information.
All the best for now, Vanessa and the forum team