Going to work as PM in Cloud/BigTech, what coding skills to learn next?

I've always wanted to learn to program, and finally, I've gotten the time to go for it. My objective is to gain the foundations so that afterwards I can learn on-the-job, while also getting deeper in areas of interests like web programming, AI and blockchain.

I've already completed CS50 introduction to computer science, an intro to ML in R course, and now I'm halfway into CS50's Intro to Web Programming.

I have spring half-time and all summer full-time to learn before starting work.

I'm willing to continue learning online or even a boot camp if it's worth it.

So far my I'm planning on taking System Design and Data & Algorithms during spring, but that still leaves room for other stuff.

Any recommendations? Thanks!