Hello @heartgirl and welcome to the forum where you are going to find answers and insight from fellow members to just about any question you might have. You pose a great question and many other members have also asked about the same. You can find helpful assistance here Search results for ‘choosing membership plan’ - TrustedHousesitters Community Forum
Any time you have a question you may find it easier to just click on the spyglass at the top of the page, type in what you are looking for and read various posts from other members. If you don’t feel you have gotten the answer you need, you can also just post here and I am sure you will get lots of feedback.
For additional feedback and for our members to get to know you better, link your member profile to your forum profile here How to add a listing or profile link to your FORUM profile - Owner & Sitter Exchange - TrustedHousesitters Community Forum.
Once again, welcome to the forum. Looking forward to seeing more posts from you.