I am a try hard

I love MacOS Sierra to death, and I have a TimeMachine that works really well for what I need, my Mid 15’ is almost desd, and I wanted to upgrade, and I went for a M5 MAX, oh well, I didn’t know how wrong I was… so I cutted the check and went for a MBP 2019 4TB 64GB.

So I am trying to instal Mac OS Sierra, and when I boot from the usb, it says it needs to be updated, and it takes me to the “Tahie” installation tool.

Now I am creating an image of OS Sierea inside of the Mac OS Extended Partition I made, and while waiting I came here for help. PLEASE Do not judge me. Be polite and helpful if posible.