Teenage grandson seems somewhat lost as to his future

Am a bit concerned about teenage grandson. He is in the 2nd year of A levels but is bored with study and definitely does not want to go to university. He dreams of running own business but hasn't a clue where to start. He has no real ideas. I think he has been influenced by programmes like Dragon's Den and seems to think running a business is easier than it actually is. I can see that he is not his usual cheerful self and feel that he may be getting a bit disillusioned about life. A few of his friends know what they want to do and are setting off on their various paths but he seems somewhat lost. At that age there is so much going on as we all know. His parents just want him to be happy as do I. Last week he said he felt he was getting nowhere personally and that he was useless. I don't know what to advise him and obviously I am only the grandparent so can't involve myself too much but in any case I don't know what to say. My only advice has been to get a job with a big company where there are prospects to move up the ladder. He is personable and presentable which is a good start.