Mewsie, Welcome.
Have a heart to heart chat with your instructor in a relaxed environment (not the plane!). You are both people, and can chat as mentor and charge, so as to best guide your effort. We all have plateaus in our learning, and that's okay, sometimes you just must reflect on what you have learned, while practicing to cement those skills, before moving on.
If you are having trouble mastering landings, focus on what you know you are being asked to do. Then sit for hours and watch other landings. Picture for yourself what is good and not so good about them, and what you would do for each to make it better. After 40 years of flying, I still do this at the restaurant at the flying club.
Then, when flying, remember that to plane is much more controllable than you think. You are flying, fly it to where you want to to be on approach, and keep it there - don't let it fly you!
Tell your instructor about your concerns, and ask how you can find other ways to learn what is being taught, there are other learning tools, if your instructor knows what you need. Also, consider a running patter to your instructor as you approach to land, speak everything you are thinking and doing. You and your instructor may find that something which would be helpful to you is not in your thought process, or not when it should be.
Good luck!