I understand that a lot. I read somewhere recently that it takes energy to take in something new, so a lot of us folks who feel tired tend to fall back on the familiar rather than overcome that friction. It's trouble enough finding the mental resources to work on projects, I find, so my leisure time is typically pretty predictable unless something of enough keenness catches my eye.
I feel like solo games are amazing to help develop like, creativity and imagination and personal voice, but again that sounds like work? Overcoming that inertia is certainly a struggle ;w;