Hi Denish, Pokhara is a popular hub for trekkers in the Annapurna region, but not necessarily the starting point for the treks themselves. The most common starting point for the Annapurna Circuit trek is actually Besisahar, a town located about 7 hours by bus from Kathmandu. You can also start the trek from Bhulbhule, which is 7 kilometers away from Besisahar. Also, here is a page to help you plan your trek from other bloggers: https://www.tripoto.com/search?keywords=annapurna%20base%20camp