I make a point to point network whith two RB433 and two wireless cards. I configure the AP and Client also put the network IP 192.168.1.5 Net 192.168.1.0/24 for lan 1 and in the Wlan1 10.0.0.1/30. Then in the other side wlan2 10.0.0.2/30 and the ethern 1 IP 192.168.2.1 Net 192.168.2.0/24
After that I put a route in AP destin 192.168.2.0/24 gateway10.0.0.2 then destination 0.0.0.0/0 gateway 192.168.1.1 pref source 192.168.1.5 ( for my Internet Router )
In the client side put 192.168.1.0/24 gateway 10.0.0.1 then destination 0.0.0.0/0 gateway 192.168.2.1
Ok at this point I have internet in the Ap side But for my short knoledge I can’t do take internet for the client side.
Also I want to can see the files in the both side of this networks. This is a trust Lan.
I apresiate any help. Thanks.

haven`t you forgot to set up masquerade (chain=srcnat action masquerade)