I also have an internet addiction! And usually what I do when Im not on the internet is usually draw..traditionally (with paper, i mean), thats nice, but sadly I dont have the motivation to do that most of the time or it just gets frustrating. Another thing I do, is still online, but at least a bit creative - origami. I put on some tutorial on YT and follow that, even tho your usual origami video has about 12ish mins, it usually takes 20 or more to complete. Some origami take me even an hour if its a harder one. I like that, because it makes me feel like I did something "useful" with my time instead of just mindlessly scrolling. You could try it, start with easier origami! Its also a nice way to decorate your house a bit, I currently have a yellow paper parrot sitting on my PC monitor.
Also, on YT (which is where I mostly scroll..) I put a "put down the screen!" reminder (its somewhere in the settings), that has at least reduced the scrolling from 2 hours to like 40ish mins...(I put it to remind me every 30 mins, but thats customizible!)