If you have any general doubt about Linux, choosing Linux distribution, doubts about installing Linux etc, you can post your query here.
Does Linux provide a log of what happens in terminal? Might be nice to review what happen on that day. Commands performed, install packages, new items you learn, etc.
The history command is just that. I have even set alias h=history in my .bashrc file.
if you just want to see administrative tasks, do e.g. history | grep sudo