I'm curious about what you mean by "taekwondo". As a beginner, you might not be aware that there are 3 main disciplines within Taekwondo. They are sparring, forms, and breaking.
Your height matters in each discipline.
In sparring, height can give you advantage of reach, but only if you are otherwise strong. Longer legs will require different body mechanics than short legs: just ask anyone who is proficient at golf. A 9-iron is significantly shorter than a 3-iron, and the difference is that when the body moves at the same speed when swinging either club, the speed of the club head is very different (as is the angle of the club's face). This has effect on the height, speed, and distance of the ball's trajectory.
It is the same with Taekwondo, specifically kicking. A smaller person can probably kick faster with less effort due to the less weight of the leg/foot having to be moved, compared to you. Also, you have to be careful about conditioning your muscles for better control. On one hand, with inexperience, you are significantly disadvantaged in terms of speed, strength, and reach. But with experience and proper conditioning, you become more advantaged. The caveat is that you have to work at it.
As to forms (poomsae, or hyung, we call them; or kata as the Japanese refer to them). In Taekwondo, it is required to judge a competitor's skill in terms of body positioning, among many other criteria. A forward step/stance, for example, in some styles should be 1.5 shoulder-widths apart from front foot's heel to rear foot's toe. This stance looks very different between two people who perform this movement as prescribed, but the taller person will appear as not looking correct. Tall people have always made this complaint. Their front stances can look like a shorter person's walking stance. Thus, they are judged more critically. I know, I'm a judge, and I see this all the time.
When we factor out the competition of a form, and replace it with the utility of applying what we're taught in forms to self-defense, we are much more free to adapt the concepts taught in the form. So a tall person's front stance need not be so rigid at 1.5 shoulder-widths apart, and rather, what is more comfortable for the person to use the stance and not be easily unbalanced by its use.
And then there's breaking, the other main discipline. The issues here are similar in sparring. Longer legs means more distance to travel, and therefore, you are more susceptible to minor under- or over-corrections or minute performance in technique. A shorter person might get away with lifting the knee but not come to a full chamber for a side kick, the taller person can't always get away with that as they need the proper chamber to provide the potential energy to throw the same kick. The shorter person can't hope to garner power with poor technique, but with lesser boards, that's not a problem. A taller person can persevere later when technique is more mature. Spin kicks deliver faster foot-speeds, and axe kicks are more able to convert potential energy into kinetic energy. And then there's jumping. A shorter person generally has to work much harder to jump higher than a taller person, but the taller person has a harder landing.
So there pros and cons to being tall and short. It's up to you to capitalize on your physique and make the best of it. You can't change your physique, you can only work with it.