Well, the best of luck with that ... as I said, he would be best advised to start with amateur racing, and use that to convince promoters that he still has his talent, and is willing to buckle down and be honest.
As I understand it, they are going to start with practice sessions and so on. I have attended these and amateur racing in winter with freezing fog and snow ... I doubt if they are going to have paying racing for spectators before May, even if the NL starts before then.