i failed out of uni so take my advice with a huge grain of salt. but its ok to fail or rescedule. as long as you persist ofc. I failed some class and the shame made me fail more. reality is pretty much everyone has parts of their studys that are boring or incredible hard. and pretty mich everyone fails some stuff. Just make a plan, figure out what made you fail last time (if it happends) and try to prevent that next time.
tl;dr: dont be like me. be open and honest to your friends, professors and family. and you will make it :)
Really depends on what you do and value. I use lots of kde software, so kde distros are my go to. then one big diffrence between distros is how they get updated. do you want the latest updates asap on the costs of stability, or do you want an effing never crashing distro but lag behind in updates a few months/years, or a middleground.
These are the two points i considered when i choose.