Hello @Augustus and welcome the forum, and to this new beginning.
You hit the nail on the head when you say you’ve gone back to childhood, that’s just how I felt nearly 4yrs ago 
Reading, writing, speech, even using a writing implement was like a 2yr old wielding a crayon. That’s aphasia for you 
But that’s ok, it can and it will get better for you; just as it has for me!
You just need to commit to it. The key is to try not to be too self conscious of it, because that can hold you back or slow your recovery.
Speak as much as you can, read out loud in private to practice.
Keep coming back here and posting or reply to posts. That’s what I did. This forum was my therapy both for learning to type again and improving my communication skills, spelling and grammar etc.
Read what you can on here in short bursts, a paragraph at a time.
You can always come back come back to lengthy posts of interest, just reading them in short instalments.
Take full advantage of this forum as I did, there will always be fellow survivors on here who will understand what you write and what you are going through, so you are not alone here 
@garethc970 is another member with aphasia, here’s his latest post below.
There is so much I want to tell you to help you with this but I know this post may be getting too lengthy as it is.
Lorraine
Stroke Improvement Group