mtb’ing isn’t interesting to those who don’t cycle.
It depends on how you discuss it. If I mention being out in new areas of natural beauty when the seasons change, seeing animals and the humour of occasional clumsiness people seem to be engaged. If I talk about the latest part I’ve upgraded they start dropping off.
Do: talk about something they can relate to.
Don’t: talk about headset standards, CNC, fatbikes, ti, or other nerdy details. They can’t connect with it.
Anything can be interesting, you just need to understand how to talk about it!