Hello there, Picasso!
I love this saying and all that it implies. I love the idea of breaking rules to be unique and to express yourself. I love that in art, all forms of it, you can't do it wrong and you don't have to be classically trained. Because guess what? You can't do it wrong!
Now, I am not saying others will jump on it and fall madly in love with your chosen expression, but should that matter? It is an expression of you and if one doesn't like it, another will. And luckily, there are billions of people in the world so your chances look pretty good that it will resonate with someone.
I am not classically trained in photoshop or lightroom. ( I am google and youtube trained. I haven't got time to sit in classes. I need to explore and do and I am really great at learning as I am doing.)
I am not classically trained in photography. I just work non stop at learning and took a ton of really awful pictures to learn to take really amazing pictures. Thankfully, there are a lot of people willing to share their knowledge on the World Wide Web so everything is literally at your fingertips! (I still learn and still take some really sucky pics. But somewhere on the roll of 300 pictures, are some really cool artistic and creative shots.)
You know what else I do? I break all the "rules". DO NOT TELL ME WHAT TO DO!!! LOL.
Seriously though, I don't want my stuff to look like or feel like everyone else's. I don't want my pictures to look like they were staged right out of someone else's pinterest feed. I want to be different and unique and try new things. I want my pictures to be a creation that reflects me in that moment. And isn't that what artists do? Isn't that what makes us unique?
So, if you are out there and you are starting up your own graphic design shop or taking pictures or painting or dance or whatever your craft is, just know that you can be different. You can put your own spin on things and break all the old rules and try it! It may suck, but it may be pretty freaking amazing too!!! Practice, stay true to yourself. And if you can make a living doing all the above, then you are one of the lucky few that took a chance and became an artist!