I'd start with some reading. There is a brilliant little article on these forums regarding exposure -
Exposure Basics: A Complete Guide for Beginners - Articles and Tips | PentaxForums.com. Ms son who's just starting to take photography bit more seriously, emerged with a clear head in regards to the most important concepts after reading it.
Next, I'd look for your camera specific book/guide. The manuals shipped with cameras are not very beginner friendly and the format is annoying. While not a novice to photography as such, my first days with my K7 where overwhelming and I found going through the manual exhausting and discouraging. I found an ebook that I still go back to at times. Can't remember the author of the top of my head, but can check in my paypal history if you are interested. If I remember correctly the author had a whole series for various Pentax cameras. Bought one for kiddo who's using my old k100d.
When reading, have your camera at hand. Be it a book, or a guide, or random tips. Familiarize yourself through with the menu. You could even take another route and simply Google for those menu terms you don't quite understand and read up individually on what they refer to.
Once you're familiar with the basic terms, forget about Auto mode, and simply turn the dial on to the next in line, and explore all it can offer. When in doubt, ask, or Google
. Take lots of photos in each mode, by the time you get to full on Manual, it won't seem scary at all. In fact, you might end up wanting to skip a couple and head straight to it. Shot, shoot, shoot. Take your camera out whenever you can, or shoot inside if you can't. Don't necessarily bother fixing all your photos in Lightroom, rather use them to observe the effects of your actions. It won't take you long to start seeing the dependencies. If in doubt, or you forget how something works, don't get discourage, have another read from another source. That's the beauty of internet. When you don't quite understand something as explained by someone, you can happily find an alternative 'teacher' or ask less generic questions on the forum and get accurate answers.
It all seems overwhelming at first, but the basics are easy to learn. Once you're comfy; mastering it, is another story. But that's where all the fun is