You've gotten some good advice on the set-up and how-to for streaming. The big advantage of streaming music is access to an enormous library of music that you could never possibly collect on your own. I've got a subscription to Qobuz and their current library has over 80 million tracks. Compare this to my personal collection of just over 60,000 tracks. Qobuz lets me instantly check out new releases, new-to-me artists and composers, along with material that I've read about or had recommended to me. If I like it, I can mark it as a favorite to make it easier to find again.
Now, if you're happy playing the same songs over and over, you can skip streaming with no big loss. However, if you still enjoy finding new artists and new music, there is no better way than streaming to accomplish that goal.