setup (on the WordPress side, in .Renviron) was discussed on the slides, see goodpress setup vignette
install the remotes package,
install the goodpress package,
remotes::install_github("maelle/goodpress", ref = "main")
create a folder, possibly a subfolder in a folder called “my-wordpress-posts” or so, “2020-07-03-cool-post”.
in that folder, create index.Rmd.