positions 2 and 6 are essentially the same thing, beside the alpha carbon where the hydroxyl group is attached to. the 2 and 6 positions fall under the ortho-position.
unfortunataly, the hydroxyl functional group is electron withdrawing, so it is is meta-directing. meta refers to position 4 for your information.
an alternate method is to add an hydroxyl group to a benzene ring that has a ortho-para directing functional group attached to it, eg. methyl benzene. the methyl group is electron-donating, so it is ortho-para directing.
in the case of methyl benzene, convert it into a diazonium salt, then hydrate the diazonium salt. This will replace the diazonium group with with -OH.