type into google

Anonymous proxy
Anonymous Surfing

or anything like that...

Once you get to the website if it has a box that you put your address into just put in CANNABIS.COM Homepage and try to login, if it doesnt allow you then the post method is not allowed and you just go to the next website till you find one you like

If its slow go to the next website aswell.. once you find 1-2 that you like its just like surfing as normal... there is better more advanced ways but that method above will be 100 times better then no proxy