Empty nest?

So is this the empty nest feeling? If so, I am not that averse. This weekend my first born son moved out. I am, weirdly enough, okay with this. However, I do feel this overwhelming urge to fill the gap. Again, what to do? I need space and time to really think about what it is I want to achieve, what it is I want to do and, most importantly, what am I good at? I need meditation time and peace and quiet.