Our greatest resource these days, is Youtube tutorials, of which there is a near infinite amount...



My general mindset is to watch several different people's tutorials on the same subject, like blending, shading, color theory etc etc, because each person is going to explain it slightly different, and you're more likely to receive a more clear understanding, by learning from multiple sources.



My personal favorite youtubers for learning would be KNKL (Kienan Lafferty), Sinix Designs, Sycra, Ahmed Aldoori and Istebrak, as the have a fairly modern view on learning art, but there are just so many good videos, the main thing is just to always be watching as many as you can, from people you enjoy listening too... The more information you can collect, the better... And get used to practicing along with the videos, even if you're just copying what they're doing, copy and extrapolate.



Another good resource, and one that can be much more in-depth and personalized, is getting involved with Twitch Creative Communities. There are a lot of really good artists out there, that stream regularly, and are almost always willing to answer questions and give critiques, and most have Discord servers where you can interact and share with other artists, both people learning, and people who are already professionals.



On Twitch, I can't recommend enough that you find time to check out a streamer by the name of "p00se2". He focuses mostly on sketching digitally, in an amazing hatching style, but his primary focus is on teaching people the fundamentals of Form and Perspective, and he's REALLY good at it... A lot of my growth is thanks to his methods and mindset.



That is more of the main point for me, the most important thing for learning Art, with our wonderful access to the internet, is to not go it alone... We don't have to figure everything out ourselves anymore, and we don't have to be lonely shut-ins. =] Get out there and get involved in the Art Community, it is full of so many wonderful and helpful people.