I get your frustration! I was on a similar boat. The key to digital art is first knowing your tools, it's good that you've tried out some apps, try them all out and get a feel for them all, before choosing the one that you prefer.
First, for Wireframing and workflows, there's a ton of different ones that all achieve the same thing so it comes down to preference mostly. For this I highly recommend looking into Concepts, Muse and Moleskine Flow. I personally prefer them out of the many others that I have tried. Although be aware there are more specialised 'wireframing' apps also available.
When it comes to other character drawing and general art, Procreate is currently ne of the better ones as it gives you a ton of options with different brushes etc. I personally prefer Adobe Fresco as I like their interface better and their live brushes for a better 'painting' look. I also use Moleskin Flow for non-painting drawing practise as i love their minimalist approach to UI out of the hundreds of apps that I have tried.
It's a little bit of a steeper learning curve if you're not used to digital drawing with frames, choosing brushes, etc. but honestly. keep at it as once you familiarise yourself with you preferred favourite app it'll be a lot quicker! Yeah all the tutorial videos always seem to be aimed at a more slow, general audience. Once you have the gist of where everything is in your preferred app, just have a few favourite brushes of your choice start creating.
Lately I've started to dabble with digital art and 'painting' and learning to draw on an iPad.
When away from electronics (and the iPad), I now keep thinking of what I'd like to paint for my next masterpiece and coming up with ideas for future paintings in my mind. It's incredibly refreshing, and also helps me sleep.
I really hope they integrate it into default weather well, in a way that it remains unchanged to current forecasts from Dark Sky.