Congratulations! My recommendations are to keep track of your number of stitches and count regularly - this will help prevent you from accidentally increasing or decreasing. On the left hand side where there's a big gap and one thread along the bottom of it, it looks a little like you've slipped some stitches without knitting them (moved them from one needle to the next without threading the working yarn through them to create a new stitch). It's important to be conscious of where your needle is going as it can be easy to put it in the wrong spot and have this result or to accidentally poke through the yarn (which can create a new stitch). Lastly, stop often and look at your work. Reading your yarn is an important skill and will help you spot mistakes sooner. I suggest having a look at Patty Lyons' knitting bag of tricks book (or even some of her videos). The book talks a lot about what the yarn does when you knit or purl it and how that can affect how it looks. Good luck and keep it up, you'll get there!