If you only use your computer for the most basic of operations (browsing the Internet, watching Netflix, writing documents, etc.), Chromebooks are fine. However, I’m assuming this discussion is about laptops versus desktops.
Basically, all you need to care about between laptops and desktops is the balance between portability, power, and affordability. If you travel a lot, get a laptop. If you need the processing power for video editing or gaming, get a desktop. If you need to edit videos while traveling, get a gaming laptop. If you don’t need any of those, get a second-hand Dell desktop.
If you need to use a laptop but hate the keyboard and trackpad, nothing is stopping you from chucking a separate mechanical keyboard and a mouse into your backpack. A lot of people in tech actually just do that.
Play video games in English. Watch English-speaking YouTubers. Interact with people online using English. As long as she enjoys the content, proficiency in the language will follow.