Audacity has what they call "chains". Others may refer to these as macros. You can chain multiple commands together. I used it to add the reverb and echo and then save as an OGG file. You must run a file through the process once so the presets and values are set. Then you can create a chain. Audacity has plans to expand the chain commands in the future. I did not figure out how to add the silence to the end and be able to add commands for the "skip to start' or "skip to end" which would make the process easier.
https://manual.audacityteam.org/man/...utomation.html