Hello @SadieMarie and a very warm welcome to the Community Forum 
Are you already a member? Will you be sitting or a homeowner or perhaps both?
For reference if you are a member, once your listing is completed you can also add your TrustedHousesitters profile on to your Forum profile by following the attached link, should you wish. This will then enable others to offer you helpful advice and feedback and will also give your listing extra exposure!
I have also attached a video for you to explain how it all works
Also, remember you can use the spyglass symbol at the top of the page next to the TrustedHousesitters logo and search for any questions that you may have as they have most likely already been answered on here and of course if not then please just ask! 