Having decided to develop your singing art, you need to know that the voice for singing is not an ordinary conversational voice and it simply needs to be given much more time and spend considerable effort to support it.
It is often necessary to engage in the development of timbre and breathing, improve diction and articulation, and develop vocal characteristics. AND even for an exceptional teacher, the need for independent exercises (for example, breathing) is not canceled.
Therefore, in order for the vocal lessons to become really effective, it is worth preoccupying yourself with the issue of discipline and self-control. Sometimes they are even more important than natural talent.
In any case, working with the teacher is easier, because he can immediately notice the shortcomings that require correction. With independent studies, the vocalist himself may not notice them. Therefore, when working alone, it is simply necessary to use sound recording, so that, while listening to it separately, to understand your mistakes, misses notes, etc. You can, of course, not do this every time - but at least from time to time such a practice is required. It does not matter, even if there is no specialized equipment for recording your own performance: you can use the standard programs built into Windows.
Next, you need to understand that success in vocals depends on some important conditions. The first of these is, of course, possession of a musical ear. Without it, classes will be practically useless - you just will not hear your mistakes, you will not hear notes and so on. This is a prerequisite.
The second, also very important, is the presence of voice. Despite the fact that here a person can fix something and somehow improve the situation, cardinal improvements will be very difficult, if at all possible.
Further, for classes you will need some kind of musical instrument - either a guitar or keyboards - since you will need to set the tonality of the exercises, as well as find out the notes that you can sing. If you don’t have the ability to use tools, then do not despair - the basic level is quite easy to reach, especially now that you can find dozens of video lessons of good quality on the network.
Finally, as already mentioned, it will be necessary to develop breathing, and for this to do breathing exercises. This is useful even if vocals are abandoned, because such exercises heals the respiratory system, trains and improves them.
In the end, I would like to wish everyone who wants to do vocals not to doubt themselves, but to try. Who knows, maybe the new Pavarotti or Hvorostovsky will appear. Do not lose heart, if something does not work out, it is worth remembering that "work and labor will grind everything." I would also like to say: at one time, the famous singer Shakira, her music teacher considered mediocre and voiceless. Shakira worked a lot - and now her success is obvious.
I wish you success in vocal lessons and classes, success in developing your talents!