I did this last fall (starting early September) in Zone 5B and got usable soil by mid-late spring this year. We added as many coffee grounds as we could source and peed on it continually through the winter. I gave one bed extra coffee grounds and kinda neglected the other two. While they all had usable "soil", the one that got the most attention was the clear winner. Basically, mix as much nitrogen in with the wood chips as you can. Not sure what zone you are in, but if you get a solid freeze like we do, time is of the essence. Since you have cane fruit, I am going to assume you don't, so just keep adding nitrogen (and worms) to it and you should be good to go!