setup (on the WordPress side, in .Renviron) was discussed on the slides, see goodpress setup vignette
install the remotes package, install.packages("remotes")
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.
in index.Rmd, paste example content. look at the YAML field, see also goodpress usage vignette
knit.