The easiest way I can think of is if you have Sonos. Then, there is a built-in Sonos integration, and you can control whatever is playing (which could be Spotify). According to some community posts I've seen, you could do the same with Echo Speaks if you have any Alexa devices, but that is community code and requires some installation and setup on your part that is harder than most community code due to the extra/external server needed to authenticate to Amazon (but it's not impossible, and the instructions do spell it all out). Keep in mind that this integration is unofficial on both the Hubitat and Alexa sides so could stop working any time. Hubitat also has a Chromecast integration, but it is stuck in pertpetual beta, it appears, and I'm not sure it supports this type of control over Google's smart speakers (it might; I don't have any, but the entire integration also just stops working for some people from time to time).
I'm not sure what posts you've seen, but if you see one solution that appeals to you other than the know-how to set it up, perhaps link to it here and see if someone would be willing to spell the steps out for you more clearly. (Welcome to Hubitat, by the way!)
Otherwise, there's always the option that probably most people take: accept that media control isn't Hubitat's focus, at least for the moment, and find another way to do this or keep doing what you're already doing.