This year I upgraded my Pixel 2 to a Pixel 5a. Had the Pixel 2 for five years. The upgrade to platform that was four years ahead was great, and only cost $150.
Patience.
Patience.
Given this internet connected device stopped receiving security updates in 2020, this seems like a poor decision. Security updates for the 5A are expected to stop next year.
Please buy a device that receives security updates.