criminology level 3 diplomaWatch this thread
2) A degree in Criminology is a Sociology degree with a few extra units, Do the Sociology degree. It will leave far more doors open to you.
3) A degree in Criminology does not make you 'a Criminologist'. To be a Forensic Psychologist you need a postgraduate degree and experience and the job isnt as glamourous as you might think - see https://www.prospects.ac.uk/job-prof...c-psychologist
Do 3 sensible A levels - Sociology, History, Psychology etc. There are a hundred degree subjects you could do with these.