Yes! Work on your stances.
Your stances are responsible for facilitating getting you from one place to another. If you are in a stance, your thoughts should be "where can I easily move from here?", because that's exactly what your opponent will capitalize on. There are a few basic stances: back, front, horse, cat, parallel, natural, walking. Your school may have different names, but whatever they are, practice them, and get a feel for their pros and cons.
For example, is your weight predominantly on your rear foot? Then you're going to have difficulties moving back. Are you leaning forward? You're giving a gift to your opponent who can kick higher at you with less risk. Are you in a horse stance so that your back is back and you are squared with your opponent? You can move side to side, but moving forward and back is not so easily done. And so on. So for each stance, imagine an incoming kick or strike: where can you easily move and either get out of the way, or counter with something else.
There's no one perfect stance; good fighters change them up all the time, and that's the next thing to work on: changing up your stances. Move from back stance to front stance, and back again. Switch your stance, so that you are right-facing, and again so that you're left facing. Your goals in this drill is to change as fast as possible so that you shorten the time to change, that reduces the window of opportunity for your opponent.
In combination with practicing different stances, and changing stances, is to move your position while keeping your stance or move your position and change your stance. Either way, the key is moving. Slide up or back, slide from side to side. To hide your intentions to move, fighters often bounce on the ball of toes. Good fighters change the rate at which the bounce, but beginners need to be able to move and change stances while bouncing, and so, this should be a priority. When you get good at this, then work on changing your tempo.
If you are an absolute beginner, then you should do these things without a technique. But if you are intermediate, or more, experienced, you should be doing these techniques on a bag or with a partner (but since you qualified your question for solo work, a bag or air kicking is the way to go). So, work on your combinations, your aim, your defenses, your awareness of where you can go, your technique, your stamina.
Much can be done without equipment, you just need some space. But you get better mileage with a hanging or standing bag, and of course, a partner.