I bought a Prusa printer and have no idea what I am doing [3D printing]

printer: https://www.prusa3d.com/de/produkt/prusa-core-one/ FreeCAD: https://www.freecad.org/ Nomad: https://nomadsculpt.com/ -Printables- HDMI cable holder: https://www.printables.com/model/1413769-hdmi-cable-organiser Little Nightmares peephole decoration: https://www.printables.com/model/1417098-little-nightmares-peephole-decoration wood frame: https://www.printables.com/model/1422995-round-wood-frame crate: https://www.printables.com/model/1295444-stackable-crate-plus-honeycomb-edition-less-materi tablet stand: https://www.printables.com/model/376433-tablet-stand soy fish: https://www.printables.com/model/536349-soy-fish-lamp-lightsoy @bisonrimant capy & pig: https://ko-fi.com/bisonrimant