Miss Barkey, it is time to re-tool your thinking.
You've got a lot of encouragement to keep on keepin' on, and that's my advice too. But as you consider yourself a beginner, then begin to do a few things that beginners do: think "IT's OKAY to take stitched blocks apart, and do it a second time better." Make that your mantra.
And to aid in that decision, set a longer stitch length. Larger stitches are easier to remove. And instead of tacking down every single seam when you come to the end; just let it be stitched once through. And if it will help, loosen your tension, to give a more relaxed stitching.