Formalize everything into policy as code - this normally presents as PR actions. Take time to learn the PR process, but look for where there’s friction that can be collapsed or removed. Once you’re comfortable with testing solutions (linters, compilers, etc.), apply them to only your branches, and bring them to your boss as a tested solution when perfect starts to feel like the enemy of good enough.

It may be worth evaluating whether or not the DevOps path is what you want in your career as well. If it’s an opinion you’ve yet to solidify on, set clear goals with your boss in a few weeks that give you clear wickets to re-evaluate that opinion at over the next several projects or months.