Hey @JRLarsen - welcome!
Here are a few tips for a fresh start with UHK - some thoughts I had when I read your message.
The great thing about the UHK is: you can start off as a regular non-split keyboard and get yourself used to the 60% layout. Whenever you are ready, move to split with both halves quite close together, and gradually move them out to whatever feels comfortable for you.
The same goes for tenting. Start flat, and when you want to try tenting, you can install the tenting legs and flip them out. Your body, your hands will tell you when you want to try that step. Maybe one day you want to tent even more, and then you can order yourself a Riser 60.
The UHK60v2 has backlit keys. You can colour-code your layers as a reminder which layer is currently active (you can see that on the display, too), and also as a reminder where certain functions are. You can configure the colour and brightness for each individual key. So for example, you could highlight the HJKL keys in a different colour when on your navigation layer.
You can further individualise your board with Yuzukeycaps, but then you will not see much of the backlight as these keycaps are opaque (not translucent - they don’t let light through).
So it’s a bit of a choice. If you are already sure how you want to configure your 60% layout, sure, go ahead and order yourself Yuzu caps. With the configurability of the UHK, I however see a lot of users playing around with their initial configuration before they stabilise on their long-term setup. You could wait a bit to see what you end up using before settling on your Yuzu design. (Or you just order another Yuzu set when you want to change it.)
Give yourself a bit of time to get to know the feel of the keyboard, the split layout, the 60% functionality, and experiment with Agent and your personal layout!
People here on the forum will happily jump in to help you with any questions.
Have fun on your journey!