[thomasrossi]

When you don't know yourself even a victory has a defeat inside. Among all that you said: math and data science are very nice skills to have. A theorem is not a matter of fashion it is true (under his hypothesis) it will always work for you.

I am extra full of things running in parallel so no good teacher here! But I can share my experience: what made me step up from random to mediocre programmer were the test classes, because finally stuff was making sense: the test class is the theorem, my code is the demonstration, I could work with that. You have to find your ways to make cool things work efficiently and reliably.