I have sewn together my first 9x9, to get one big block.
I've also been hard at work making the next set of 9 patches, which currently look like this.
Just for fun I put them side by side:
Two things have occurred to me: firstly that I might keep going with the 9 patches and make in total 9 of these bigger blocks, which would give me a reasonable sized end result. The second was that I rather like the juxtaposition of these two sets, so need to sit down and have a think about how many of the circles I will make and how I will place them as I go. Maybe a little doodling is in order next.