Any tips for endurance or anything else?

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things that come to mind for endurance: make sure the way you're speaking is comfy from the start. If you notice pain or tightness or roughness etc then that can sorta snowball. If you feel like you're pushing at all you want to see if you can relax

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aside from that general vocal health good practice stuff - stay hydrated, avoid triggers for stuff like acid reflux, avoid things that get you dehydrated, try not to do stuff you know hurts your voice etc

consider doing some vocal warmups - maybe to start your day etc.

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It's giving Britney Broski in the best ways