Hello @FiM and a warm welcome to the Community Forum 
To answer your question and to confirm as @temba mentioned, it is not possible to share a welcome guide unless it is with your confirmed sitter/s. You could print it off as @temba suggested, or screenshot as @Looney suggested though.
For reference, as a member, 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!
If you are unsure how to do this, or if you have any questions at all, do not hesitate to ask, we are all more than happy to help.
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!
I have attached a thread below, it would be great if you could join in with this as we think you could offer great feedback and would be a great addition 