BraveToastR34

So I'm new to this server buying thing and I was wondering how an aspect would work. I was going through the checkout for a server for Ark: Survival and it was asking me to choose a map, so my curiosity was if I chose the map now and wanted to change it later would I be able to update it while keeping my payments recurring or would I need to cancel my subscription and then re-up it under the new map. If the first option is possible, if I was able to switch maps whenever I wanted to, would the people on the servers be able to transfer to the new map and keep their gear or would it start everyone anew?