Does it have to be online? I'm in a similar field and I don't know how I would usefully spend even part of that on training. I'd rather have $5k worth of time off to pursue all the free learning options that are our there. To me, it's not really a field where paywalled information is the bottleneck.

If you can go to in person conferences, do that, for the networking.

Or depending on what kind of compute you have access to at work, just ask if you can have 5k of aws / gpu time to explore what interests you.