[digikata]

Do a CRUD app. Try to make few features, but finish it. If you want to do more later or other projects thats fine, but finish something because it's good for you and for potential employers. Be able to talk about at least one 'thoughful' interaction in the app. If you have interest in the other areas you mentioned, keep learning about those too - they're worth it, but likely small investments over a longer time period of pay off (they will likely pay off if you keep at it).

I'll mention this as a long shot too, the machine shops and courier companies give you an interesting exposure to something that many direct-to-college software engineers may rarely see. Talk about programming to people there too, you may find out there is software you could write to solve problems for those types of shops.

The important thing is not the odds of any one thing, it's that you keep rolling the dice on things that can improve your lot. So good luck and keep your chin up!