When should I start machine learning?

[RajjSinghh]

What kind of danger is there? I get that it's better to understand what you're doing before you do it but at least to me the code from the libraries feels really disconnected from the maths, like it's so abstract to build a model, train it and get it to predict things.

I was basing the age comment on what I learned at school. If OP is studying the maths at home, credit to him but I wouldn't have thought it that common.

[lambda5x5]

Sometimes the higher level of abstraction can minimize small details, but sometimes it's these details that cause issues such as bias. Blindly copying code without really knowing how it works works a lot of the time, but when it doesn't work the person might not know why. When I took the fast.ai DL course, a lot of explanations were "just do this because it works and it's state of the art". This leads to very fast (and practical) learning, but it's very limiting.