No worries.
Right the first thing you have to do is go to the British embassy in Rabat, this can be booked before you fly then go there on your first day in Morocco. It's a nice city to visit. They will give a certificate of your passport. Everything in English needs to be translated to Arabic but there are lots of places that do it, like solicitors here.
Then you go the aduls office in Marrakech, they will send you to various courts and the police until you have got all the stamps of approval. You can tell the adul you need to return to uk and give permission to carry on in your absence. Then when all that is left to do is the nikkah then you can return with family. I got married in Marrakech and basically you the adul completes the nikkah and it is in a small office, it's not organised and you just have to wait till it is your turn. It's not no ceromony in regards to setting or having guests or anything like that. It's like a doctors surgery!
I'm not sure if you will need a male relative or not, I would find out first but for will definitely need father to complete at the end, unless married before.
What is really important is taking the correct paper work when you go. Is your husband to be Moroccan and in Marrakech? Can he ask the family court what they need, it could have changed.
A fixer is basically someone who helps out and pays bribes. I didn't know the money I gave was for 'easing' things but unfortunately it was.
Are you aware of the five year spouse visa route? You have to earn £18.6k, visa costs about £1000 then £695 after 2.5 years for renewal and £200 a year nhs fee. Husband needs English certificate too.
There will probably be more recent posts on papers needed etc but ask away and will try to remember, it was over three years ago