Sonlight curriculum might just be a perfect fit for you. Lots of good readers and read a-louds, detailed schedule, and easy to follow. We did SL first grade for early kindergarten, but you could look through the catalog for the best level to fit your needs. The catalog lists the reading level for each book, which is SO helpful when choosing books for precocious readers. It also has an advanced reader list that you could choose. The Sonlight catalog is a treasure to have in your hand when you visit the library or attend a used book sale.
We have a rapid learner in our homeschool that also read fluently at 3. I suggest you don't try to hold your child back. Don't try to keep them in Kindergarten if they can move forward with joy and smiles. I tried to "do" Kindergarten for 6 months with my 5 yr old and he was bouncing off the walls. I didn't know it was boredom being manifested. During that time he said, "Mom, I want to learn history, I want to learn about all of the wars."
We skipped ahead to first grade in language arts & math, added science, health, spelling and poetry, and started Tapestry of Grace for his history craving. He also started playing violin that year.
This year we are doing another grade skip for him, moving from 4th to 5th. We are still loving TOG. It is perfect for bright kids.
Hang on tight, we parents are just along for the ride with these accelerated learning kiddos!