If you are into coding, I would say give it a go. You can learn in your spare time and see if you really like it and want to make a career out of it.

Stacks, huh, it is a tough one. It is really individual, I personally have started with C, but didn't like it, than moved to Java and now JavaScript and Node.

You can maybe try with this https://javascript30.com/ and see how it goes.

Best of luck!