How to relocate for a design job for a UI/Ux designer based in Nepal?

what do you mean by relocating? do you mean to change your field?

if yes then it's easy to do as you said you already have expertise in graphic design. First try to read some articleas what's the difference between UI/UX on platform like Medium.com

then

try to learn more tools like figma,adobe xd,invision or sketch if you use mac. then try to learn how to make prototypes