First time playing Fo1 and i'm losing it

The two main problems ive had is how bad everything feels in fullscreen (sluggish mouse, fps etc) and some graphical issues whenever i scroll around. Scrolling causes walls to change shade and have lines appear on top of them half of the time. While going into windowed fixes the mouse and fps problems, id like to not be so zoomed out all of the time and just play in fullscreen. I'm on a 1920x1080 monitor and would like to play on 1366x768 as i think that looks the best. I've tinkered with capping fps in nvidia, changing almost every setting in the ini file at this point as well as installing Fixt but it hasn't seemed to change much. Im on the steam version and any help at all would be appreciated!