You must remember that I started shooting 40 years ago and that I have always been fascinated by light and trying to understand it. In these years I have worn out the shutters in 2 F4E film bodies, one D300 and one D700. I thought I was quite good when I landed the job as assistant photographer/copyist at Uppsala produktbild, but I still didn't understand light at that time. My first weeks on the job was mostly spent in experimenting in the studio as soon as there was time available and getting severe critique by my employer. This was a crash course that was about equal to 2 to 3 terms of full-time study in how much I learnt. This was in the mid 90-s, so over 20 years ago.
The most important is to shoot lots, always bring a camera and when you get home, not only sort out the good shots but analyze every culled shot as to why it is not as good as the keepers.
Don't be afraid to experiment and try some whacky and/or goofy ideas... With the right approach, you *can* shoot flowers in hard sunlight or landscapes midday, but it will be much harder than using the traditional techniques.
One thing that dramatically raises the keeper rate is when you break through the conscious/unconscious barrier and the mechanics behind producing a photo no longer takes thought. The camera and lens becomes a part of you when that happens and you can concentrate fully on seeing. This sounds like mystical mumbojumbo until you are there, but it is very real. That is the reason that I sometimes don't bring a camera as the photographer's vision can get in the way of experiencing things fully.