You can try night lenses (orthokeratological lenses), they correct vision during sleep, in the daytime you can refuse lenses and glasses. According to indications. If laser vision correction was not considered, then it is also acceptable with a certain degree of myopia and astigmatism. The best solution is to visit a doctor who will select an acceptable method of treatment.
It depends on what your minus is. Gymnastics is an unreliable method, and can only bear fruit with great persistence on your part and a very small minus. If you have -4 or more, then it makes sense to consider the possibility of laser correction: such operations are now on stream, this is a quick solution to the problem. If you have -2, -3 - that is, a little, but it interferes with life: then the lenses. Glasses, in my opinion, are more comfortable, but not an option, so not an option.
Professor Vladimir Zhdanov outlines a method for restoring vision. It all looks quite old-fashioned, but in due time it was she who helped me.