I'm not really in the same boat as you, but experiencing some uncertainty of my own. My divorce was finalized just a couple weeks ago, and I'm still getting used to a new rhythm for life where the kids are at their mom's some of the time. Those nights when the house has only me in it lead to a LOT of questions, and time for those questions to pop up. Like, who am I if not dad, or husband, or career guy, or grad student? Or whatever... I mean the gist is that life got into a routine where I was basically a collection of roles. Pull me out of them and I don't know where the heck I am. It takes time to fill the spaces where something else was, and more time - I'm finding - before that something else starts to feel like, you know, me.
So what to do with that newfound time? Honestly, I don't know yet. I really love the idea of creating. I'm gradually making progress on my garage - once it has more free surfaces available I really want to start working with glass and ceramics. I'm going to get all crafty. I want to remember what it's like to read for recreation, too.
For you? I guess that's the big decision huh? You get to decide who LK is outside of those roles. I'll second the pursuit of music, because I know you're good at it. But more important is what you love. Shoot, I want to learn to play a mandolin someday and I've never picked one up in my life. All that matters is that you get into you, and you just enjoy the time with you, and enjoy your time with Nitefox - I'll put a personal note in here too and say that it's always good to dedicate time to really growing with your s.o. Do something that you both enjoy, and do it together (not that, pervs). When you get all wrapped up in your life roles, it can really put a damper on a relationship.
I'm really glad to see you posting stuff that shows you're looking forward in your life, by the way. My heart just broke for you all. If anything look at it like you've got a free license to dabble - pick up new stuff and drop it left and right. Finding the stuff that sticks is half the fun