Routing through routers

Hi all,
I have the following configuration of my home network:
2020-07-28-PPP.png
I am sitting behind the Yellow router.
I can ping Red router as well as Blue router on 10.10.3.254.
But I can ping nothing behind the Blue router, especially his LAN network 192.168.80.0/24

I was trying to set NAT to translate the address from 10.10.3.0/24 to 192.168.80.0/24 as well as firewall rules but without the success.
Can somebody please help me and guide how to properly set NAT and also firewall to access Green router from Yellow?

Thanks