Hi @Vaidrius0
Welcome to the community 😊
Once you’ve booked a long-term reservation, you’ll be charged for the first month of your stay upfront. Airbnb holds this payment until 24 hours after check-in before giving it to the host.
Byways of explanations, you won’t make a second payment until approximately one month after you check in. The monthly price you pay is locked at the beginning of the reservation.
The Airbnb help article.
https://www.airbnb.com/help/article/245/how-do-i-pay-for-my-longterm-reservation