Congratulations on your concerts, both of you! @Nightlite (カーボイ), your post reminded me of that Tom & Jerry cartoon where Jerry gradually sabotages the orchestra and Tom has to stand in for every member...
I play the alto saxophone and I actually have a concert today!! My favorite song from the concert would be "American Declaration", though it is the hardest it sounds super cool!! Outside of band I'd say my favorite song to play is "Just the Two of Us", I know, I know, a little corny but I've only been playing for about 2 years... I also have 3 different other instruments which are the keyboard, recorder, and acoustic guitar!! But the alto sax is my main instrument!!
I think that’s my problem. I have no clue how guitar strings are organized or what hand positions are used.
I took some guitar classes and my teacher told me a phrase to memorize the notes and what order the are in, it goes like this, "Eddy Ate Dynamite Good Bye Eddy" so EADGBE if that helps a bit!!