Given about 6mos to a year, you won't be chasing ammo for the .17WSM.
Rimfire ammo is a bear to come by right now, so that's not necessarily the .17WSM's fault. But, I'll give the experience with the .17M2 and .17HMR as an example.
They "came out", which is to say they were announced at SHOT show, then on websites, news releases, magazine articles. Everyone went looking for them on a shelf, then said "well I won't buy one because I can't find ammo". But the moral of the marketing story was that people went looking for it, more than half the battle in sales.
Production is always behind press-releases, so we didn't see ammo regularly on the shelf for about a year after their supposed releases. After that, it was became a supply and demand thing.
So no, it's not easy to find today, but given a few more months to 1) let the ammo craze finally die off (already started) and 2) let production catch up to the press releases, and you'll never have problems finding ammo for the .17WSM.