Whether to choose a fitness instructor depends on what your goal is. If you want to be a master of fitness, have a particularly good pair of muscles and a good salary, I think you can choose a good fitness instructor as your sparring partner. After all, novices will have a lot of equipment, you can't operate it, and avoid asking others embarrassed.
In addition, equipment is very important, but we also need to assist some other fitness actions. For example, when you firmly believe that you need to warm up before, there are many aerobics, and equipment can't help. A good fitness instructor will improve your fitness efficiency faster.
If your fitness purpose is just to get bored, or to improve your figure and feel yourself, then you don't get enough exercise. If your family level is good, you can hire a fitness instructor, but if your family level is average, there is really no need to hire another fitness instructor. Or start with the most basic running and cycling to improve your core energy.
Although you may have some equipment that you don't need, you can study online, or you can ask questions without shame, or you can watch others learn with your own help. Wait, there are many ways. You don't need to find a classroom fitness instructor. However, even if you don't find a fitness instructor, you must find a warm-up video online to avoid excessive injuries.