So I've changed all that and tried a few things. I've settled on golf (used to play as a child - I'm 49 now) and playing piano (played that as a child too).
Anyway... I'm happy af now (only way to put it).
Not to sidetrack this but I reckon unfinished stuff is a definite cause of mid-life crisis: I realised that I start many things but don't finish them and often use the excuse, "meh, it wasn't for me!" to justify it and funnily enough, from the middle of last year to this year I was decidedly unhappy but couldn't put my finger on it. Since I picked up the piano and golf again (both things I quit at before), I've never been happier.
Anyway, golf and piano :-D