So I ask you for a unity version (specified version number) that is tested and won't cause me issues in the future, and at least supports the Third Person Character Control Starter Asset.
Some of the versions I tried:
unity 2021.3.3 takes too much time to build (1 hour minimum) especially mobile build, "Your device is weak", I never had this issue with older versions, same project, same assets, takes less time.
unity 2020 and before, many of the assets I need are not supported.
unity 2019 manually setup android build (please kill me) + won't work at the end.
unity 2021.3.16, newly created URP projects by default are bugged with the issue (Burst Compile Error) and I can't add the URP package to an existing project.
You should check release notes from each build at this site if you think an older version will suit you better, you have pre-releases as well on the hub or website but those might cause you trouble in future since they can change substantially until they are official releases.
Although It is strongly recommended that you install a LTS version due to support, go figure.
Each issue you face its either your fault, and you can solve it with a search on the topic, or its a bug and its either been fixed on a later build, pending resolution (there's plenty) or you could create a bug report.
This is not my place entirely since I only use Unity but I hear Godot is light weight and could fit you better.