Bloody hell purple!
Firstly well done for quick thinking and getting him to hospital - a lot of times people don't know what they're dealing with and "try to sleep it off" the quicker to get to a hospital the better the chance for a full recovery. That said, recovery is dependent on the severity of the stroke - your thread in chat suggests that it wasnt severe?? Is that right?
Now the main thing as you say is his treatment plan and he must stick to it - this episode may have some psychological impact on him in fact it would be doubtful that it wouldn't. This may come out in depression frustration or even denial, but in the circumstances is completely normal probably healthy as to have these things pent up with not help with the healing process. Alternatively he may be a real positive I'm going kick this shit to the kerb type in which case try to help him see that he must pace himself and not push too hard and fast.
Back to the treatment plan he'll probably get physio and SALT but only if the issues haven't subsided - it could be that speech returns but mobility doesn't completely or the other way round and so they provide programmes for the areas affected - usually in a specialist centre. There may be days when he doesn't feel like it because it's a lot to take in but I'd urge him to really try hard to stick to it - it really does pay off in the end.
Now, over to you - you have a young baby and this is a lot to take and I'm sure you'll gladly do it. But, there will be days when dealing with a baby and a dh recovering from a stroke will be overwhelming - you must must must be kind to yourself, make time for you and accept all and every help available. Look out for your own psychological well bring as it you may need to talk to someone as I'm sure this has scared you senseless plus you've not long had a baby and those hormones are all racing around - remember that you are human not a super-hero.
BTW I'm not a nurse/dr or anything - my grandfather had a number of strokes and I took him for his appointments and did his exercises - stay positive it can seem like a dark place in the beginning but things get better and your dh has age on his side - my grandfather even after 3 strokes continued to live independently at 86yrs old!!