Hi Struggling.with.R,
It looks like you have R installed correctly, and a couple of thoughts came to mind.
From the attached pict, it looks like it's trying to load the contents of .Rdata from your home directory when R is starting up. There may be a very large object stored in that file which could slow things down. First thing to do, is close the R console, and delete that file, and make sure that the preference for saving the workspace when R is shutdown is deselected.
Second, R loads everything into RAM, so having 14 programs open simultaneously will likely have an impact on R performance, and on MacOS X overall.
Hope this helps