If you want to monitor keywords on Twitter and not just in your timeline, you might be interested to check the iOS app Clatters : https://apps.apple.com/us/app/clatters/id1480930237
Full disclosure : I'm the developer
That being said, I am really impressed by this new service. Creating such a solution in just a couple of hours/days is astonishing.
Pick up a language/framework, build a small project and put it on Github. Start approaching companies that are using the same technology and looking for freshers/interns. I have seen this work for few of my friends.
Goodreads and Amazon were two places I used to go to check out book reviews. Now I can get best of both in one place. Makes a lot of sense for Amazon to buy them.