Maybe easy isn't the whole answer. How about one that is much easier than it looks, such as Carpenter Wheel?
Here's a tutorial for a little one:
https://www.youtube.com/watch?v=OeZlWsTIRfQ and here's a free printable pattern:
https://www.patchworksquare.com/inde...el-quilt-block. For a larger wheel, there's this thread
Carpenters Wheel / Star Easy Project Reference Sheet in which stitchenbee gives a useful method for figuring the sizes as well as a handy view of the layout. This type of quilt can be quilted as elaborately or simply as you might like.
One more idea for getting the squares to match the size of the hst blocks is to just grab whatever size squares are handy for you, make hsts from those and then measure the finished ones to decide how big to cut your plain squares. That seems to be the way to do it with the least possible stress. Even if they're some odd fraction, all you have to do it put some tape on your ruler to have consistent sizes without eye strain.
I know what it's like to hit dry spells. Hang in there. The joy of quilting will likely come back to you.
In any case, you've definitely arrived at the right website for quilt inspiration and encouragement. Welcome!