Welcome to simmr!
If you want the official stable version of the package from CRAN then go to R and type:
You can then load the package and view either the quick start or the full user manuals with:
Alternatively you can install the latest development version of the package in R with the commands:
if(!require(remotes)) install.packages('remotes') remotes::install_github('andrewcparnell/simmr')
You can then load the package with
… and look at the user manuals via: