Get a GitHub account: message if no account can be found via whoami? I.e. either you have no GitHub account (with a public address/with the username as environment variable) or something is amiss with your whoamisetup.
Install git: check git is installed somehow.
Check git config (via usethis)
Connections: Git, GitHub, RStudio: not relevant
Check there's a PAT, otherwise point to usethis function.
Put a template for default DESCRIPTION to clipboard via clipr, calls usethis::edit_r_profile().
Via https://github.com/lockedata/starters/issues/11#issuecomment-457290489
The function would help automate as much of https://usethis.r-lib.org/articles/articles/usethis-setup.html (and for things less easy to automate, print out reminders?).