New foreign language with zero background?

Hi- I have a junior guy who is interested in learning a new language from 0 to 60 and is not afraid to work hard this summer. He took Latin in HS so open to pretty much all languages. Does anyone recommend either through an institute, a program, or an online DE course? With social distancing it must be done through distance. Thank you!!!

Thank you!!!

Check to see what your local community colleges offer. Note that college foreign language courses go faster, so a semester of college foreign language is often equivalent to a year (or even more) of high school foreign language.