Study after study has shown that going to a "2nd grade" university makes no difference to your skill level and lifetime earnings. They basically compared people

Study after study has shown that going to a "2nd grade" university makes no difference to your skill level and lifetime earnings. They basically compared people who were accepted to "top grade" universities and chose to go somewhere else with people who did go. So don't stress about it. Simply learn as much as you can on/off university.