If your Chromebook is typing in things you didn't type, then here is how you fix it. Click your profile picture in the bottom right. There will be a keyboard icon, click on it. Then change your keyboard to US Keyboard.
To change your language on your Chromebook get one of your friends Chromebook go to the settings on both Chromebooks then see whats different in the settings
If your Chromebook is zoomed in, here is how you fix it. Click your profile picture in the bottom right. If you have an Accessibility tab make sure magnifier is not checked. If that is not checked go to your settings. In the search bar type in "internal display"