How do you retain information when jumping between different subjects

I'm trying to learn programming, Spanish, and finance simultaneously. I spend about an hour on each per day, but I feel like I'm forgetting things from one subject when I focus on another.

It's frustrating because I'm genuinely interested in all three, but the constant context switching makes me feel like I'm not making real progress in any of them.

Has anyone found effective strategies for juggling multiple learning goals without everything becoming a blur? What's worked for you when trying to build knowledge across different domains?