Ask HN: What advice do you have to yourself in your first job?

As I've found and participated in this community, I've found it very insightful. I think there are a lot of wise people here, and wanted some advice.

I'm 22, and I'm in my first job as a Software Engineer. I genuinely love what I do, and am looking for guidance on how to progress through my career the best I can.

My main goal this year is to build up successful side projects and get a second source of income revenue, no matter how small.

What advice do you have for your 22 y/o self?