Honestly dear, it would be somewhat difficult for you to get admitted into any college which covers the B.Sc Psychology curriculum in Assam. But don't leave hope and keep on trying for different colleges, follow their eligibility criteria and even if you are waitlisted, wait till the final list. If any vacant seat remains your can make your chance positively.

Good luck!! Here is a link of good science colleges in Assam, you can follow their brochure to get your B.Sc Psychology curriculum.

https://university.careers360.com/colleges/list-of-sciences-degree-colleges-in-assam