I’d recommend what I did. I kept the Umbrel node running for lightning, but also run Bitcoin Core (pruned) on my laptop with Sparrow for on chain funds.

Once you’ve done the initial sync, you don’t actually need to keep Core running 24/7 for cold wallets.

It’s funny how running Core is often the last step in many bitcoiners self sovereignty journeys, when it’s actually so simple to do (the biggest barrier I had was learning the steps to verify the download, but even that is simply a matter of following the step by step instructions and takes a matter of minutes!).

Sounds like you're on the right path. :)

Keep stacking & keep learning!