As a starting point to my answer, I would say that reading a book is not sufficient to start doing automated trading on your own as chrisaycock suggests in his comment.
I would answer your questions in 3 different ways.
First, building your "AI bot" which I would rather call a systematic algorithm not only requires programming skills, it also means having access to market data and, if you want to make it fully automatized, access to brokers APIs to send your orders. All this costs money, so if you're not a big, big investor or a firm, it's not likely that you will have the sufficient fund to really tackle the world of systematic trading. Don't even start thinking about feeding prices manually to a systematic strategy as an individual; you'll go on holidays or get drunk some night and forget to do it which will screw it up.
Second, building an automated trading strategy which looks good in a backtest does not mean that it will do well in the live markets. This phenomenon is called the Implementation Shortfall and it adds to all the usual biases such as data-mining, survivorship bias and so on. Essentially, depending on the amount you wish to invest, you'll just give away your gains in transaction costs. What do you do if there are bugs? What do you do if you have no internet for some time?
Finally, even if you're successful for some time, keep in mind what Nassim Thaleb calls "Monkeys on typewriters" in his book Fooled by Randomness (which I suggest you should read if you haven't already). Basically, this concept explains that out of billions of monkeys who would decide to write randomly on a typewriter, one will finally end up writing the Odyssey of Homer. So, it is possible that you will start by making profit, and it is possible that you know someone who's been doing so on his spare time for 10 years but bare in mind that it might just be luck. Being successful in systematic trading requires a lot of experience which comes with making mistakes and hence loosing money (so, if you're not ready to lose some big amount of your own cash it's gonna be difficult). Also keep in mind that even the most brilliant minds combined together to from systematic systems sometimes get it wrong - very wrong, so being alone won't help.
I'm assuming here that your strategy would be looking to generate alpha rather than beta. If you want to do an asset allocation system trying to optimize your risk-adjusted return as a small investor, then it makes more sense to me.