I use RenPy! There are other alternatives too, but RenPy is free and it has a great community, so you can try to check it out. It's actually pretty easy to build a basic visual novel type of game. If you want to have more advanced stuff incorporated into your game, you'll need to learn Python, but it's okay to start small first :)
Do link me when you created your first game! I'd love to check it out!
Does Chromebook uses Linux OS? I'll try to build a Linux distribution separately and attach it in when I'm off work. I'm hoping y'all will be able to play it then!