While not for the faint hearted Al Brooks has published his approach to trading raw price action in a 3 volume set covering trends, ranges and reversals respectively. Each volume is about 500 pages, extremely technical and not cheap. The consensus seems to be that his approach requires much determination, time and effort to grasp (let alone master) "but it's worth it". A search of the Interwebz will turn up free intros, videos, etc.
Tim Morge has published a lot of info about recognizing SR levels and interpreting their significance in the context of median line trading. He offers (expensive) courses but has made most if not all of the core material (30-40 webinars, articles, PDF files) available for free on a few websites he owns or sponsors but also on the Interactive Brokers website under archived webinars. Again, a search will turn these up.
From a technical perspective lately I've been using modifications of the MT4 "TLB OC v02.mq4" indicator for its method of picking SR levels. While the indicator is intended for use with the three-line-break approach to breakout trading (i.e., SR level failure) it's one way to incorporate SR levels as a metric in a bot (EA) as an aid to placing entries, stops and targets whatever the algorithm. I use TLB SR levels together with a couple of divergence indicators for MACD and Stochastics derived from a public domain RSI divergence indicator when trading manually.
In general the length of time it will take to become consistently profitable depends on your gifts, your work ethic and what barriers you have to overcome psychologically. There is no substitute for experience. When I started out I was completely naive (e.g., no clue what a system was) and profited from a foundations course purchased from a more or less reputable vendor. In my case, in the 15 years it took me to become a so-so trader I studied trading psychology and every concept, indicator, method, system, platform and language I stumbled across, including every fad in artificial intelligence, while battling a host of counter-productive personality traits--hopefully your journey will be shorter and less arduous