Hi Mehak you could go to Kullu district it’s paradise . there many small unexplored beautiful villages and endless trek options specially if you go to Kheerganga from tosh. Tosh village is heaven there’s no motor access inside the place but amazing hike points and you would be so close to the mountain range . From there you can hike Kheerganga a must do place . But pleAse carry light and be prepared to face 0 or minus degrees to these treks . You can also start with malana which is closer to Kullu and head down to kasol chalal Manikaran and tosh
Well there are a lot of options.
youth hostel of India
India hikes they provide good experience at low rates. you might have to do health checkup for booking the same as trekks are sometimes challenging but I have personally tried them It's a great experience