What you need to do is talk to the SENCO at the local school and see what facilities they have, and look up on IPSEA the steps needed to obtain a statement or EHCP (am in Wales, so only know statements).
Also ask what is available in your area: where I am we have bases which are a halfway house between SN and mainstream- the kids get specialist support but on a mainstream campus so they can access as much or little as they are able: two of mine attend Comp Bases, and most primary kids with SN around here attend these, either mixed SN or specific autism units.
With a diagnosis of Asperger's you will have to be particularly proactive, as many kids with that dx never need to have a statement and LEAs will resists if at all possible- yes money but also because traditionally that's what they do. Many parents of children with Sn find they become tiger mothers and I certainly have had to.
Have a look at the NAS website as well, get a feel for the information there as well, and make links within the local Sn community as IME you will find FAR more there than from official sources. Our SN rugby club was a lifeline that way.
WRT to warnings and the rest- yes it's hard work. Timetables of the visual sort are useful, and you can play with types to find what works for you- EBay often has good ones. have one with schedules on as far in advance as you can displayed, and another where your child proactively puts completed activities on with velcro so he can get that sense of where he is in his day. Get timers for countdowns to make things tangible for him, whether fancy 20 minute ones from specialist shops, poundland ones or tablet apps- find what works for your child. Make as much of the day a comfy routine but try not to be absolute- even if it ends in tears, a deviation on the way home or in the morning can mean just enough flexibility to survive an emergency. trampolines are fab for desensitising a child when they arrive home, though some seem to fare better with a quiet activity such as a jigsaw or the same DVD- again it's hit and miss (we have 3 on the spectrum here and they are all different).
Good luck; the time around diagnosis can be very hard emotionally but you will both get there.