Yeah, really I just want an open-source poker solitaire that asks me what I should do and then shows me the odds after I answer.
If you want to quickly improve to a proficient level there's no quicker way than to read Theory of Poker and Hold 'em for Advanced Players. Both of these books focus primarily on limit poker, but the concepts are critical for no limit as well. And you'll realize there's a lot more strategy and nuance in limit poker than you thought.