Are u going to get ur visa stamped because u want to start ur opt from oct? if thats the case then u don't have to get the visa stamped unless u want to go out of united states that is when u could get it stamped before going or u could go to nepal and then get it stamped while comming back. i would highly recommend you to go and get ur visa stamped only after you have atleast a months pay stub . anyway if u wanna go there yes u will require a visa since u do not have GC or citizenship. things that u require for h1b are. here is the site for h1 b stamping www.path2usa.com/immigration/h1bcorner/h1b_visa.htm for the canadian visa visit this site. canadaonline.about.com/od/travel/a/usembassy.htm