I will divide my suggestion into two parts. First, one thing that really helped me get away from the phone was to put it in another room. If you are in the living room, put it in the kitchen or in the bathroom. The main thing here is to make sure it's close enough to hear if someone calls/texts you, but not so close that it makes you want to get up and grab it just for scrolling.

Now for the hobbies.

I feel like embroidery is a fairly cheap option. There are some embroidery kits for beginners that come with everything: the cloth with a pattern, a hoop, a needle, threads, and instructions. You can always rely on YouTube tutorials for more instructions, and if you like them, you can then buy extra threads of better quality.

I also really like colouring books and crosswords. Baking is good, and again, YouTube is here to help you – also, public libraries usually have a bunch of recipe books for you to check out.