Hello friends! Such wonderful comments I have been reading and rereading.
I consider myself unlucky for not having wife and children yet. On the bright side, I could consider myself young (<4 years to go before I become middle age uncle T.T)
To work on songs from zero, got to sort out the goals and motivation. After getting the mindset down, it is time to work on it, and work on it until it works. And when it is about time management, it is about prioritizing life events.
On guitar and music, my first priority is to work on music projects to be published on YouTube. And I will commit to learn new songs (new tricks essentially) to be applied on the project. If I ever getting busy in the future, and I could find some time to work on music projects, then I will find time to work on new songs.
Every morning I will go through the repertoire (selected songs), and it is inpiring to do so 
(Oshio’s Wings You are the Hero make my day happier, really =) )