Careers advice? Really have f*cked it now

[rtha6551]

Hi all, bit of background info basically I'm 21 now, with no qualifications other than a half decent set of GCSEs and what do they even mean in the real world :/ I've spent the last 18 months working towards a career in the Royal Navy only to get medically discharged on the 3rd day of initial training due to a colour vision defect that should have been picked up last year.

My current thinking is either:

A) Go back to call centre work while I save to do my full Cat C+E HGV license. Eventually do an open university course in Engineering.
B) As above but instead of the HGV license save to go back to College next year while keeping a part time job. Then go to full time university however this means considerable debt and potentially not gaining my degree till I'm 28.
C) Try and get on my local police forces specials and go for a career in the Police. However I do have reason to believe they may not accept me based on some silly mistakes as a youth. 

There is absolutely nothing in my local area that would give me a decent career rather than just a job on an agency. 

I know people on here are pretty good with career advice and a lot of people from different sectors of work so I would really appreciate any advice or guidance on what would be the best thing to do.

Thanks