Go to Listing and click Availability.
Under Booking Window you will find options to block dates in future.
See if it lets you block all dates into future.
I will look for how to snooze, meanwhile you won't get any requests.
If it won't let you block all dates in future, block as much as you can at this window,
then go in to the calendar and block the next six months so there is overlap between the calendar blocking and the future date blocking.
Keep in mind that you will have to update the calendar blocking as time goes by. Also, sometimes the calendar unblocks itself, so you will still have to respond if someone messages you or your response rate will be affected. (Snooze will mean you don't have to respond because you won't get any requests.)
Take off instant book if you have it!
Keep looking for Snooze. When you want to UnSnooze, go back to Availability and take off all the blocking.
Hope that helps.