Shouldn’t appear too early though.

There were very few people at one (distant) point

No one left alive at one point:

https://www.scientificamerican.com/article/human-ancestors-nearly-went-extinct-900-000-years-ago/

man /s

Linux has come far enough that you go just go at it, and search forums for any questions you still have.

e.g. just search “how to install [distro] linux as dual boot”