No, Obi Wan and Luke found Han through contacts Obi Wan had at Mos Eisley having lived on Tatooine for years and gone to the trouble of maintaining underworld connections knowing he was on the run from the authorities, and they didn't just rock up and say "Yo, we're buds now," they employed Han and Chewie to smuggle them somewhere, that being the job of a pair of smugglers.