You can just use it as is. What do you want for your island? Drawers, need to cut it down, what size? It will be a little short, but if you are not tall, should be ok.
Hi! I've done this and it was so easy. You can peek if you like: https://www.exquisitelyunremarkable.com/2013/06/decorating-cheats-farmhouse-table.html Hope it gives you some inspiration!
Just remove the table legs and use 2x4s to create ones in the height you want
Add some hooks paint it and bam get some stools your done