Having read this back the following seems to be huge plug for the RPS, it isn't meant to be, I'm sure there are lots of other organisations, groups etc. that provide similar services and I think that what I am really saying is that I find paying for tuition from proven professionals focuses the mind much more that scratching around trying to pick the good from the mediocre on youtube.
The RPS isn't all about awards, in fact that's only a small part of what they do but one definition of photographic mastery must be achieving Fellowship of the RPS. That said, personally I have no interest in the awards but I do attend several of their events, it's great to be in the company of other serious photographers, even if only via zoom at the moment and the range of activities is vast. I did a workshop with Paul Hill last year, Paul Hill critiqued some of my photos! I also did a Simon Ellingworth workshop -
http://simonellingworth.com - a Sony award winner critiqued my photos (and actually said I should enter one of the them to the Taylor Wessing - I'm sure he was just being kind). I listened in on a talk with Trevor Yerbury, not really my genre but very interesting (
https://www.yerburystudio.com/) and several others which were free to RPS members.
I have to say that I watch a fair amount of youtube stuff but nothing compares to a day with one of these guys and typically for the price of a filter or a family meal out. Also, lets be honest a lot of the people on youtube are wanna-bes and have only really made it on youtube, not for the excellence of their photography.
Also Magnum do courses and portfolio reviews -
https://www.magnumphotos.com/learn/
Before the current plague I used to make an effort to go to galleries and look at photos such as the Sony World Photo awards exhibition, there was a Cindy Sherman exhibition at the National Portrait gallery a few years ago and Don Mccullin at the Tate for example. Obviously it's up to you which direction you want to go but I would recommend, if you are not doing so already, getting more immersed in the wider world of photography, not just taking photos.