Hello and welcome
You and your DH might be surprised how much he can handle at the time but if it was me Id have another support person.
I had DH and my mum with all my 3, mum just stayed on the side lines but it was nice having her there and knowing she would step in if needed
And you asked if it was too much to ask a friend...I think a friend would be honoured if you ask them to be there for the birth of your child
good luck and I look forward so seeing you around BB