Western saddle for Dutch mare?

Back in the day, I did all sorts of things with my horses. I’m missing that and my new barn has lots of opportunities to do various things. I would like a western saddle to play around in - I don’t see us ever roping cows, doing serious cutting, etc. She wears a Med to MW tree in English saddles, but does need wither clearance. She’s not shy about letting you know if something is wrong. I do have a store not that far away that has lots of used saddles, and plan to go soon, but don’t want to look like a fool!