Moving main domain to subdomain

Hi,

I have website virtualtourshospitality.com and I want to move it into subdomain which is virtualtourshospitality.seeinsideplaces.com. I have moved the files in subdomain but when I open it, I saw whole website is scattered. I am sure there is a proper way to change all the URL’s . I have read number of articles but I am looking for any perfect instructions.

Any help will be appreciated.
Thanks for reading…

Waiting for your kind reply…