If you have a list of places, and you need to find their latitude/longitude coordinates, you have a couple of options.

OPTION 1. The first and more convoluted (but ultimately worthwhile) option is to get a Google API key from the free tier of the Google Cloud Platform, install R and RStudio, and then use this tutorial to work with the "ggmap" R package. I would also recommend watching this YouTube tutorial to fill in some gaps in the first tutorial. 

OPTION 2. Assuming you don't want to learn a new programming language and deal with Google's developer code, here is an alternative: