Welcome, Melissa and Jakob! You'll love it here!
I can sympatize with you to an extend regarding your son's challenges. My older ds (11 in 5th) struggles with dysgraphia and some sensory processing issues. I had to start him 2 grades back in math and it took us a long time to catch on to subtraction and regrouping, and now he's struggling with multi-digit multiplication. Thankfully homeschooling allows me to help him work at his own pace and not compare himself to the other kids in the class. The younger ds (7 in 2nd) has ADHD. He excels at reading, spelling and math, but finds focusing enough to complete a task in a given time frame very difficult. In PS he almost never completed any kind of seat work, and only finished two crafts in two years.
This past year was our first year homeschooling with them after a couple of very difficult PS years. It has been a blessing, though my older son who is extremely social has missed the socialization of school. (Personally I've been grateful for the absence of the negative influences. ) My younger ds doesn't genrally "click" with other children, especially those his own age, but has recently been developing a good friendship with a boy from our church who is a year older than himself.
It's been a good year, but I'm finding working part-time and still accomplishing everything I want to accomplish with them difficult. Thankfully they have voted to continue working on our Apologia Flying Creatures throughout the summer (because it's easier to find insects to study) as well as their math and copy work, just at a slower pace. This should help take the pressure off the rest of the year. Organization is my biggest problem. I am always trying to tweak things to make it work better for us, but I have yet to find a system I really like.