Hi Octo. Great work!
About the front and back of your knitting: Now, you’ve learned that when you make color changes, the back will always look worse than the front of the fabric. It’s just the nature of the beast when it comes to changing colors in knitting.
If you’re making a hat again, the back will be on the inside of the hat, so it shouldn’t be a problem. If you’re making a scarf, you might want to make TWO of them, then seam them together down the sides.
Or, you could knit the scarf on circular needles, making it a tube from top to bottom. The “wrong” side of the fabric would be in the center of the tube if you do that.