1. Since you do not have a store, all you can do is post a notification that you will be out of the office and will not b be able to respond to eBay messages for a given period of time.
https://www.ebay.com/help/selling/ebay-stores/manage-ebay-store?id=4090&st=12&pos=1&query=Manage%20y...
2. Since you only have two current listings, would suggest you simply close those listings to avoid any selling defects and relist them when you return. Not certain how long an unsold listing will remain in your unsold listings ( it is either 60 or 90 days.)
"I have the right to remain silent but I didn't have the ability." Ron White, Fritch, Texas
"Stay away from negative people, they have a problem for every solution." A. Einstein
"The Devil made me do it!" - Flip Wilson
"If the band can only play loud - they ain't no good - peps too!" J.R. Johnson
