Good girl, practice is the key. And don't be afraid to make a mistake. Your mistakes will teach you. A trick I used to help students make the right size seam (if you don't have a quarter-inch presser foot): take a little post-it pad and split it in thirds. That is about the right thickness. Measure 1/4 inch from the needle (put the needle down and put the ruler or tape measure against the needle). Place the post-it pad on the 1/4 inch mark. Press it down as hard as you can. That will give you a good guide. Keep your eye on the edge of the fabric hitting the pad...not the needle. If/When the pad wiggles itself loose, just remove the last sheet and stick it down again. I taught beginner's sewing (garments) and they found this very helpful. I still use it for some things. KEEP UP THE GOOD WORK.