Decided on the accents I want to do

For the 5 accents I want to attempt to get the hang of I plan on trying: Cornwall, French, Greek, Spanish and Minnesotan. Cornwall because it's difficult, French because it's useful, Greek because it sounds fun, Spanish because I can somewhat speak the language, and Minnesotan because it sounds interesting. I will be trying to learn them using vocal positions and position movement, which I haven't tried before. The only accent I am decent at is Aristocratic British which I taught myself by singing the galaxy song from Monty
Python's Meaning of Life.