I think any research experience is valuable, regardless of the country. Try to find a position in a psychology lab, somewhere you might be able to work for a while. Based on how unsure you sound, you should probably spend a least a year focusing your interests before you apply. Your GRE is impressive, I think you would have a chance at a school like Michigan or Stanford. HOWEVER, none of that matters if there isn't a good research match with that particular program. You could have a 1500 GRE and 3.9 GPA, but not get into a school because you're not a good match for their program.
Bottom line: Take some time off to get research experience before applying to grad school. Don't waste your money on applications fees this season, schools will see that you lack a research focus.