Thanks so much, it's nice to get suggestions from someone in the same area!

These are the most helpful and practical suggestions I have encountered. You've hit the nail on the head with the exact problem I have been having working through books like Spivak and Axler. It always felt like I wasn't learning anything practical towards my work and that anything useful was a long ways away. I do enjoy the books and the material and the suggestion to pursue them in parallel is something I wish I thought about.

I will definitely check out all of those links.