Hello @Sam4573
Yes you can achieve this by going into your calendar and clicking on Availability which you see on the top right hand side of the calendar page.
Click on Availability window and select Dates unavailable by default and SAVE
You will then have to manually unblock any dates in the future you wish guests to reserve. Just bear in mind that by having such a small booking window, this will affect your chances of being selected by the algorithm.
All the best
Joëlle