Just getting started on the diagnosis ladder

Hello, this is all very new, although we have been sure for a long time, my son is likely Autistic.

It's been just over a week since I saw my GP to get a referral, and today I am going into school to chat with the SENCO lady.  Please excuse any bumblings or the like on my part.  This finally admitting that there is a problem, and now we are being taken seriously. 

Right from the word go I was convinced there was a problem with my son, not wanting to play in the garden as a toddler, high ICT skills from pre-school age, and now at 8 a very obvious disposition compared to his peers.  We have been in contact with the school for a couple of years, voicing my concerns, these were until recently just dismissed as quirky behavoiur.  He was diagnosed with Dyspraxia, around 2 years ago, and that was that, no advice, just that he would probably grow out of it.  We were just advised to have more patience with him.   

I know I probably have no real place, posting here, as we don't have a diagnosis as yet, but I am uncertain how long the process can take.  The main things are helping Myles in his emotional well being, supporting his education, and seeking advice on parenting - so I do not destroy his personality, as I am in fear of doing this at the moment.

My neighbour's grandson has Aspergers, and we have regular contact with his mum too.  It was during our contact that I began to chat about Myles, and the similiarities between the boys really set the wheels in motion, for acting now.  I am not self diagnosing Aspergers, but just admitting to the reality that Myles is autistic, in all probability.

I know I am not presenting much information, but not sure just how much to give, I guess just at the moment, it's nice to know that this place is here.  Thanks for reading.