By this do you mean how to get into the industry more seriously, or do you mean improving your techniques?
To break into the industry;
Diversify. Try to do different styles and work in different areas as you can. Don't say no (unless you are underpaid/mistreated) to working for other local freelancers who can teach you. It will give you a great idea of what you want to do and get from the industry.
My number 1 suggestion is always to work for nonprofits and build your reel. It may sound like you arent going to get paid work, or that it wont lead to anything bigger - it will, and will inherently give you an interesting subject to (more or less) practice on. My experience has always been they keep an ear to the ground and spark a word of mouth network.
They get free promo material, and you get something significant to put on your portfolio. Anything bigger and harder to manage than filming your friends "modelling" will look great on a portfolio.
To improve your techniques;
Find books like Video Basics 8 is an amazing tool. It will give you pared down industry relevant advice, and wont distract you with trends, fads, and flashy gear or content. It also wont have you running around from online source, to online source trying to find the right answer to difficult questions.
Next is to check out older video shooters online, like philip bloom. He was a news shooter for many years and can teach traditional filmmaking and video techniques. __His 10 minute challenge video is a technique I often recommend to beginners, as it is something I still do to hone my abilities.
The technique also comes in handy when shooting journalism and documentaries.
Really though, the more you study and practice, the farther you will make it.
Old Herb Zettl has you covered: https://www.amazon.com/Video-Basics-Herbert-Zettl/dp/1305950860/ref=dp_ob_title_bk