I am in the first year of homeschooling too, so first off, I know what it’s like trying everything out for the first time and trying to find the balance of providing enough but not burning out. Good for you for knowing when to not push too hard!
I’d be curious to know how much time you are spending on the reading, math, and writing that you have been doing. It’s easy for me to let those lessons in particular get long, because those are such important skills. But if you keep these short (10-15 minutes each), you are much more free to enjoy the fun of learning together through reading and narrating, picture study, composer study, nature study, poetry, drawing and painting, etc. My children and I have found such richness in the “extras” so I encourage you to schedule them in, because if you are like me, if they are not scheduled in, they definitely won’t happen!
As for the attention question, besides checking your lesson length, what have you been reading? Have you tried short readings like Aesop’s fables, or breaking other interesting stories into smaller chunks for narrating? Start slow at that age, and with practice the attention will improve!