Spring, my name is Summer. Lol! I'm pretty new, too. I guess I initially thought 1/4" was a "suggestion" and made my first blocks with absolute disregard for the seams. Thank goodness they were "crazy" so it didn't matter as much, but when squaring up time came it was a mess to get some too-small blocks to the right size!! I'm also a poor cutter, I veer away from my ruler and slice into perfectly good fabric. I think I also push too hard and go too fast.
Pinwheels sound fun! They are high up on my list to try.
Have fun with your practice quilt!