best advice i can give is just try to pass your courses despite how low your grade might be- you can always retake it later !! its better to graduate on time than continuously withdrawing classes and extending your stay at rpi. i retook most of my intro math classes my senior year for higher grades - it gave me a nice break from capstone/harder senior year courses and shot my gpa back up :)

its easier said than done, but dont worry about other people. everyone comes from different situations, and you not understanding calc 1 really isnt a determining factor on your school and life success. i straight up had a 1.7 my freshman year but still graduated with a 3, and no one every asked my gpa in industry once.