yes advice is welcome!
Okay so guard is fine. Hands position is okay. It is a solid passive guard you have to protect your face and body.
Photo 1: Your chamber is looking solid here, knee coming up, supporting leg still bent to push power through the hips.
Photo 2: the kick looks wonderfully extended however I want to draw attention to your supporting leg (one on the ground) Your foot appears (hard to see) facing your target and your heel elevated. This is a common error. This error however can be very painful through repetitions to the kicking leg joints having to compensate for the lack of rotation in your roundhouse/turning kick. RECOMMENDATION: Your chamber and kick appear to be solid enough form so I would focus on your supporting leg pivoting the HEEL to your target this is going to take your hips from a horizontal position to a vertically stacked position allowing not only more mass to be delivered INTO the target but better support balance, rotation, and delivery of power.
Photo 3: Same as 2 and 4. RECOMMENDATION: When kicking roundhouse kicks to add delivery you want to pull your same side hand to your hip. As though you are elbowing back to your target. This scissor motion with the leg will allow a counter-motion to generate more force as well as center your balance and energy on top of your supporting leg. There are a few philosophies on how to do round kicks. Your technique appears to be lifting and opening the hip AS you turn. This creates a very WIDE arc of attack but also signals to the target what is coming. Endeavor to raise your knee to your chamber first before pivoting the foot and hips to allow a faster, snappier kick that is harder to see coming.
Photo 4: The extension of that wide round kick.
RECOMMENDATION: It loses power as it swings full extension. The Roundhouse kick is generally considered a SNAP kick which means while the power does come from pushing off the ground, rotation of the hips and supporting foot. The final delivery is from the knee to the shin/instep/ankle/foot whichever. Again turning over the hip will solve many of these problems while allowing for increased accuracy as well. Think less of swinging the kick and more of piercing the kick through. If you've ever seen a really good HOOK punch vs the likes of a HAYMAKER. That can assist as well with visualization.
Overall. Love the energy. The confidence. What appears to be a solid foundation. Allow your body to pivot and turn to deliver more of your mass INTO the target in a linear fashion. You aren't turning necessarily in a *turning* kick but you are pushing and pulling to rotate your body on a vertical axis centered on your supporting foot. You push the kick forward as you pull your lead shoulder back and rotate on the axis to snap INTO and THROUGH them. Rather than arc'ing across them. The kick may feel weaker briefly as you focus more on the pivot, but this will then become comfortable and allow you to reach farther with your kicks as well as more control and safer for your knees, hips, and spine.
Force= Mass * Acceleration (lets use more mass)
Reference:
Compare how open the hip is in Front Snap Kick to a Round House Kick where i push from 100-160 degrees. You can even start to see how the hips stack. (I am trying to find a better reference with MORE pivoting as even this is too little)
Almost to this extent of pivot facing the supporting foot AWAY from the direction of the knee and kick.
@cyberfairy-mp3 sorry this got long. I said short notes but I am verbose. If this was in person I'd be shouting. "FOOT, TURN FOOT, PIVOT. Aigoo USE YOUR BODY!"

















