If I share that my clarinet piano and bricklaying is worse than swimming or spelling , it's time for a new challenge.

Chewing over a few ideas, in no particular order

Learning to properly read mandarin
Growing white tea
Snake Identification
Cycling bit more around Yunnan-Vietnam borderlands
Burma by motorbike can foreigners buy or take aThai one easily, it's a real hassle in Bokeo Lao ?
A full lap of Oz
Study Wood scuplture and gemutlichkeit in the Salzkammergut

Great you stop work drink and chasing women there's lots of leisure

Do have a secret ambition a dream project ,journey , buid a yacht or a yurt