Getting a diagnosis?

Hi, I found out about 5 years ago I am autistic. I just thought I was an alien. But, I started the diagnosis process before covid and that kicked a hole in that. So, I went to the doctor's last week and he sort of brushed me off with a website. But I can't find the bit of paper with it on, it could have been "mind" something. Any clues?

I can't afford a private diagnosis. So what are my best options? I live in Wallasey, on the Wirral (Merseyside). I did try and Google but it was a bit overwhelming to be honest.

Any help would be greatly appreciated, 
Simon