I wish I thought of this...
Shout Out to Redstate!
Trump, run for Congress in 2022. Pick any GOP-friendly district in Florida, where you're loved, primarily one run by a RINO who stabbed you in the back. You'll win the primary by a landslide. Since it's a GOP district, you're guaranteed victory in the general election. Once in Congress, after the GOP has regained control in the midterms and most of the candidates are loyal to you, you'll be elected speaker of the House. From that platform, you can lead the impeachment of President Biden.