For the university work you could try libreoffice, it works on windows too if would like to try, Epic games work through Heroic games launcher or the Epic games launcher trough wine. Please do not use Manjaro as your starter distro, it’s very unstable, Ubuntu is not your best option, Linux mint might be the way to go if you want something simple. You could try out fedora workstation, or fedora kde spin, it’s great, only remember to use flatpak for your multimedia apps.