en_tn/deu/12/08.md

You will not do all the things that we are doing here today

"You will not do as we are doing here today." This means that they would worship in the promised land differently than the way they were worshiping at that moment.

now everyone is doing whatever is right in his own eyes

The eyes represent seeing, and seeing represents thoughts or judgment. Alternate translation: "everyone is doing what he considers to be right" or "now everyone is doing what he judges to be right" (See: rc://en/ta/man/translate/figs-metaphor)