Bpb's advice was the best. Ed Miller's "Getting Started..." book is a great place to begin and you'll find recommendations in there for further study.
You asked about odds calculators, so I'll give my opinion. They work as advertised, but aren't nearly as helpful as you'd think. In many cases, the decisions you need to make can't be reduced to only probabilities. You will need to take the habits and styles of your opponents into account as well. Probability is one factor, and the calculators can help with that, but if you rely on them too much your play will become predictable to your opponents and they will take advantage of it. Some of those calculators are pretty expensive; I'd advise spending your money on a library of good poker books. The probability tables are in the books and the math is simple; you will quickly outgrow your need for a calculator if you do a little studying.
Forget about the bots. They are illegal and getting caught using them will get you banned from your poker room. The room will also confiscate your bankroll. Even if they were legal they wouldn't be a good investment of your money or time. They are expensive, require hundreds, and maybe thousands of hours of fine-tuning (during which you'll be losing your money at the tables while experimenting) and will never be more than a break-even tool for you. You'll never make your investment back.
Watch out for the play money games. They're a good way to learn how the software works, but a bad way to learn the strategy of poker. Even the lowest-level real money games play differently. Expect the games to tighten up significantly when you move to real money.
You're going to have fun as long as you learn that there aren't any systems, tools, or bots that can make you a success. If there were, the game would disappear. Study, practice, study, practice.....