This or any tiling window manager, because small screen. If dwm is hard for you, try with bellow options.
i3wm was my first, but now I’m happy with my actual dwm config.
Awesomewm starts as a dwm fork, but with all included and easier for beginners.
There are a lot more, but I start with this.
You get better screen use space and smaller memory requirements.
But your real big problem, is going to be web browser, all of them consume insane amount of RAM because of web bloat, and always is going to be a problem. Just 1 tab open and a lot of patience.
My old netbook had just 1GB ram, later I did an upgrade to 2GB and was the maximum possible.