Your son may wish to pursue an internship rather than a regular job, if lack of experience is the primary problem. Many companies take on interns, work them like dogs and pay them a tiny salary -- but in exchange, the intern acquires some real-world experience and usually gains a few skills (not to mention a potential later job-offer). Many students just out of school have the luxury of accepting a low salary for a time ... this route may be acceptable to your son and is substantially more palatable than being unemployed or taking a job that doesn't give him any valuable experience.

Feel free to message me privately about this for specific internship suggestions.