Alkoven Water damage…

Moin, I bought a Fiat Ducato BJ. 90 with Frankia set-up for the week. Unfortunately, I was pretty much pulled over the table. Bzw. also iwo’s fault, because I didn’t see it during the visit. But then I did it clean up and prepare for vacation. Namely, when I took the slatted rust out of the alcove, I noticed that it was slightly white under under it. Then I went to the bottom of the thing. Evil awakening!!! The entire floor of the alcove is molded, the wood on the left side is very strong and that on the right side “only” easy. With pictures. I have not made any experiences with this yet, but I think that I can claim not be quite unsolicited by craftsmanship, I also have the necessary tools (shreinery in the family), so I am thinking of doing it myself, the planned holiday at the end of June is probably flat for that…. Now my question to you, you think it is possible to get that back into the grip again? Do you have tips about it? Do not reach the forum?