Finding a therapist for Asperger's

I have decided after seven years without one (last one was at school when I was a kid) I want a therapist again. I won't be too negative here, but I'm not really enjoying life. I have a lot to vent about, a lot of insecurities and traumas. I've looked locally on Psychologytoday, but found very little even with a 30 mile or so radius (live in Northern England). I'm curious if anyone here is also looking into therapy or is in therapy on if they have any tips on what to look out for and what to ask for.  

Also, glad to be on here. Hoping to make some friends here, it's always nice to meet new people and hear their stories.