Start understanding everything? I don't think anyone can learn everything that's to be learned on BHW. Take one thing at a time, the one that you think you can handle it much easier than any other thing. Then accumulate knowledge. Work on basics and get hold of the basics first. See what you need to understand the basics... what tools you need, what are different steps you need to know and work on, what twists could make the described method more workable, how to try it out in many different ways, what could be the hurdles, how would you tackle them, would you need to outsource some of the steps, etc. etc.
Nothing is simple in the initial stages. Once you get the hold of the things, you move towards some success, then achieve some failures, then more success, then you're a pro because by this time you know almost everything about "your" method and how to run it. Remember learning to drive? This is almost same... in a way. Being receptive to new ideas, being PRACTICAL in working them out, and taking corrective actions are the keywords here...
Unless you're real lucky, there are no easy ways, or 1-step shortcuts to achieve success online where you've infinite known and unknown hurdles and competitors to overcome and beat. It's also not so difficult that it will take a lifetime. Success can come within 24 hours if you find the best route to it....
Don't treat this learning as the same as you learn in a school. You use logic a lot more here and your intuition as well, as you go on learning something, because IM'ing is more of an art than being a science, imo.