Ask HN: How to study ML as a software engineer?

My background: I am getting a software engineer job where ML is part of the recommended skillset. I want to learn ML to help the product or company. How should I start?

I studied Economics and had some statistics knowledge. I also had several years of experience as a data analyst.

Every day I have about 1~1.5 hours. My new job starts in 1.5 months.

What is the best action I should take?

BTW, I don't mind paying for good content.