Kasol solo trip

Hey guys, I am a female solo traveller and my last 4-5 trips have been to islands and beach based areas so this time for my birthday I'm planning for the hills. (Nov mid)

I have heard the blue sheep hostel in thirthan is really pretty, so planning to start from there. One day stay and then the next day to kasol.

I was also thinking of incorporating a trek. I've heard from people that kheerganga trek is a beautiful one but reddit says otherwise. The people I heard from have been on the trek. So should I go ahead, or are there better treks? (To keep in mind, I'm not a big time hiker, probably my second/third trek). And any recommended organizers for treks there? And as for stay in kasol, hosteller or zostel? Or any better recommendations?

It would be amazing if someone could help me w an iteneary/ logistics of it all!

Thanks in advance, cheers 🥂

Edit: I'm planning to skip kheerganga trek as the campsite and the hotsprings are currently closed, and I'm planning to skip tirthan as well. Currently planning for 2 days in manali and 3 days kasol.