Hello @JudyY and welcome to the Community Forum 
If you are members of TrustedHousesitters you can add your TrustedHousesitters profile/listing on to your profile on here by following the attached link, should you wish. This will then enable others to offer helpful advice and feedback.
This article from our Blog will take your through the process step by step as I can completely understand your nervousness
Sitters choose their sits for many different reasons and finding the right sitter starts with your listings and there are many helpful articles on the website blog, like this one I have attached the link for
Choosing the right sitter is the key to a successful sit and that is done through communication but the one important thing to remember is you have full control over who you invite into your home and not until everyone involved is 100% happy with the arrangement should the sit be confirmed. The attached link is a helpful guide.
It sounds like you have great plans ahead. Whereabouts are you based? … and which countries are you hoping to travel to or do you have certain destinations already in mind? 
If you have a photo of your pooch you could share on here, we would love to see 
If you have any questions please do not hesitate to ask, we are all more than happy to help.