What do you want to do with it? If you don’t need to store files on the computer itself then Chromebooks are cheaper than ones with storage.
If you have the budget, Apple is very user-friendly, and if you have an iPhone and/or an iPad and you get a MacBook they will ‘talk’ to one another, so what you save/write on one will go to the others. They are expensive, although Apple has brought out a new range of what appear to be hybrid devices which are cheaper and very portable. It might be worth looking into those.
When you say ‘computer’, do you mean a desktop with a monitor (ie not a laptop)? They are rarer now for personal use - laptops are more convenient as you can use them anywhere in the house, (or out of it if you like).
Tablets such as iPads are cheaper, and even more portable, but you might want a separate keyboard as typing direct to them can be a pain. If you mainly want to have something to surf the net and maybe play music and watch tv on it, a tablet may be a better option. They are basically a bigger version of a smartphone, and very easy to use.
If you give more information, people will be able to help you regarding models etc.
Good luck - technology can be daunting 😊
