Your so-called muscle production is to worry about the visual effect of muscle protrusion caused by excessive muscle development. In fact, this kind of worry is unnecessary.
Women's hormones for muscle growth are one-tenth that of men. Even a normal man needs extremely hard intensive training to develop developed muscles. And your aerobic low-intensity exercise mainly consumes fat and won't increase muscle.
The thigh tension you described is due to muscle tension after exercise, which is a normal phenomenon. More massage and stretching help to outline beautiful lines.
If you lose weight, stick to aerobic exercise and control calorie intake. Generally, the effect begins to be seen in a month or two. Exercise is a long process, but cramming is not enough!
Finally, I wish you success in losing weight!