heya, first off thanks for playing. from where you are in the original game, you should be able to go to class and that would unlock a TV discussion with Braden and open pool access.
since you're playing the original, you're stuck in the frustrating part of the game. when i started this thing, you basically had to keep trying different combinations of things to unlock the progress forward. that's how a lot of sandbox games were built then. since then i've learned to hate that method and i promise that goes away after chapter 3. if you want to completely avoid all of that, then just play the Revamp version, it's not the full story but it'll get you through the first 5 1/2 chapters without having to worry about any of that stuff. then if you still like the story you can jump back to the original and pickup the story while you wait on the revamp version to be completed.
There's also a .txt file in the game folder that has a walkthrough of all the choices and how to get through the first 3 chapters quickly. i promise i got way better. i can't stand the beginning (hence why there's a revamp). hope this helps :)