How to connect orin nx to pixhawk orange cube and then to Intel d455?

Hello im having trouble connecting pixhawk orange cube with orin nx and then to intel d455.I dont know if i have to install all those packages from that website :

https://ardupilot.org/dev/docs/companion-computer-nvidia-tx2.html

Jetpack is already installed and also the steps are not so analytic of how and what to do.

Iv also tried this article : Connecting PixHawk to Raspberry Pi and NVIDIA Jetson - Hackster.io

I used pip3 but the mavlink send me crypto kind of staff .

Im kinda confused of what software - firmware i need there are so many.Mavlink protocol , mavros,ros .

Can anyone tell me how i can connect all of this and what steps i need to follow?

Thanks.