Booked a hiking trip for me and my partner in Austria, but we broke uo yesterday. I’m super scared to go alone, what should I do?

In less then two weeks we were supposed to do the Stubai High Trail . Everything is booked and non refundable. The breakup was sort of amicable, but I’m still extremely heartbroken and I know I’ll feel that way for the next few weeks, if not months . I’ve traveled alone before, I went to Spain for a week and backpacked through SE Asia for four months, but I’ve never hiked before, let alone by myself. None of my friends or family can join me, I even asked colleagues but it’s just too short notice or they simply don’t want to.
One moment I think it’s gonna be a beautiful, healing experience, the other moment I just don’t really see it happening, everything about it is just way too overwhelming. Especially because it’s so close to the breakup. Also because I’ve never been to Austria, never did a hike like this and because I know from my last breakup that it’s really important to have loving and supportive people around me in the first few weeks. I also don’t speak German…
I did pay for everything, so if I don’t go, I lose all the money . It’s not that much money but it stings. It hate this. Does anyone has some advice?

Booked a hiking trip for me and my partner in Austria, but we broke uo yesterday. I’m super scared to go alone, what should I do?