With atrocious OD and pitiful PA, training him to be a guard would be horrible. I'd one-pos him some passing until around respectable, 1v1 forwards some to bump handling up to respectable, driving up to mediocre-average, and hopefully IS up to strong, and then just make him an incredibly short center with lots or RB, ID, and IS training. If you have the patience to shape him into a guard you've gotta be either the craziest person I've ever met or the most dedicated.