Advice from the category "if you have a headache - put the muzzle to your temple and shmalny". The only adequate advice other than how to do nothing, everyone has an individual vocal apparatus, is to go to the doctor - if there are no defects, then you can enroll in some kind of diction courses so that your voice is set so that it sounds right ...
Yes, it's simple! If the voice is high - smoke, if the voice is low - drink! :) The best vocal tutorial - half a liter of vodka! :)
A joke! Of course, you don't need to smoke or drink. All of this harms the voice in the long term, regardless of range and tonal coloration. To make your voice sound better (deeper, lower, freer), there are special exercises. You can start with these - https://goloslogos.ru/10-uprazhnenij-dlya-golosa-postanovka-golosa