Perhaps you could proactively address #3 now by using their sympathy to get them to write you a short 'recommendation' or vouch for the fact that they accepted you for their internship program, so that in the future on your LinkedIn you can note the summer of 2020 as the headline 'Internship at ______ - canceled due to Corona - instead I taught myself _____', and then in the body of that entry, start with their quote they gave about what impressed them about you, and then write the rest of the entry about what other stuff you learned / did instead.