I don't want to annoy you, and entirely understand why you would make mistakes in a language that isn't your first, especially if you have dyslexia in addition. But if you don't send your child to school you would need to home school, and so the 'situation' depends, in part, on whether you're able to do that.
I write very quickly on Mumsnet and often make typos. But I'm bothered by a thread title that contains the phrase 'there kids' along with a question about education, followed by a post that entirely discards punctuation, uses incorrect capitalisation ('i'), and contains further grammatical errors (it ought to be 'they're' contracted for 'they are' in the phrase 'there keeping'), spelling mistakes, incorrect acronyms ('etc' not 'ect', and English not being your first language doesn't excuse that one!). My primitive response is a kind of silent inward scream of 'get thee to a school!' And there's a suspicion in my mind, even in the case of a second language learner (because I know I wouldn't make all of those mistakes in French or German or Italian, languages that I don't speak well at all) that the writer undervalues education. Is this unjust? Possibly. But, realistically, I think you need to recognise that many people in our society care a lot about these things. If you are dyslexic (so am I), it isn't a licence to ignore all the rules of conventional written English; it means you have to work harder than other people to get it right.
Either way, the fact remains that your child has more to lose from not going to school than many others because you don't have the level of written English required to home school effectively. (My son who is about to start year 1 makes the 'there' / 'their' mistake, but soon I hope that he won't. He does use basic punctuation.) Of course this is no reflection on your intelligence or capacity for teaching other subjects.
If you are clinically vulnerable then your child also has more to lose from going than other children, so it might still make sense to keep him off.
We all have cost/benefit analyses to make. For some parents, school is necessary to keep both parents in work and able to pay the mortgage / keep afloat. Some people were already homeschooling. A family where one parent works as a nurse in a hospital is unlikely to be increasing the risk to their family (or wider set of friends) very much by sending the children back to school.
I would send him.