You can choose more than one membership level.
For example you may be a master breeder and also run a pet accommodation business. So you can choose master breeder and business listing.
Yes you can upgrade or change your subscription level at any time.
For example you could upgrade from basic to master breeder. You are able to delete your basic subscription and upgrade to master.
You can also change your membership from one category to another.
After you complete checkout on your selected level your membership confirmation page will be displayed.
You will see a Create My Listing button. Clicking on this will take you to the form to create and submit your listing.
You can also choose to create your listing at a later time by going to your account page. This also has a link to create your listing.