How to run an R script from the terminal

I've spent over a week on this problem, been down so many rabbit holes, and I'm about to pull my hair out. All I want to to is be able able to navigate to my folder in the terminal, run the command

./program.R input.txt

hit

, and go. But I keep getting all these error about libraries not loaded (

: Library not loaded: @rpath/libreadline.6.2.dylib

) and needed to update the sudoer file and changing permissions and then the sudoer ID isn't right. This should not be this difficult. What is going in here? I'm also running Mac OS Big Sur 11.1, if that matters.