Hi, my stepson has quite severe CP, think it is quad.
He is in a wheelchair and has v limited use of his arms and upper torso. He does manage to hold his head up, but it is an effort to do so.
He was diagnosed when 9 months, and dh always knew he wouldn't be able to walk. The consultants ween't able to predict his speech etc, but he is now almost 12 and can speak reasonably clearly.
He has attended mainstram primary, although academically he has not kept up with his peers, and socially has done well. He will attend a special school for secondary as he has such complex needs, inc v impaired sight (actually been reg blind now).
His mum had found it a real battle to get him into the school, but previously she has had a lot of support, even with some respite care, from outside the family.
\i hope you get some support, and the SN board here os fantastic.