I know lemmy is social media for people with a favorite Linux distro so I’m preaching to the choir here, but so much software is free as in speech it is truly wonderful. It’s like the only thing I love about being a millennial
Gonna take this as a jumping off point to mention some software.
Wanna get into video editing? Shotcut's pretty solid in my experience.
Into mind-mapping stuff? You might give Freeplane a look.
Have a drawing tablet & want to use it to take handwritten digital notes? Check out Xournal++.
Cross-platform Notepad++ alternative? Might give CudaText a try.
Could list off more but will leave it at a few for now.