Make my own distro for OrangePi R1 Plus

Good evening everyone,
I need your help. I am the proud owner of an "OrangePi R1 Plus".
I installed the OpenWrt distribution provided on the Opi site but I am not satisfied with it. (Kernel not up to date, incompatible module ...)
So, I tell myself that I could create my own distro but it's an experiment that I have never tried.
I'm looking to the community to see if you would have a good tutorial on how to create an A-Z OpenWRT distribution for the R1 Plus.
I looked at the wiki and the various documents on the site but I am lost.
Thank you in advance for the help you can give me.

Good evening,
Could nobody help me please?