How good you are and how fast you are depends largely on how you train, but you can learn to sing skillfully reliably, with power, beauty and great ease, at any age. You may feel like singing well, but also be skeptical that it's worth a try for several reasons. You don't need a permit or certificate to be able to take singing lessons. Yes, you can learn as an adult, but it will be harder for you to find the free time to develop the skill without a certain level of discipline.
Time management is one of the reasons why many adult beginning vocalists struggle to stay consistent. Our lives are busy and there are a lot of commitments to focus on. We want you to keep things simple and schedule just 30 minutes of practice each day. That's just a little longer than an episode of 'Friends' and probably much less than the time we spent casually scrolling through social media throughout the day.
Keeping practice times short but with more regular sessions will help you stay up to date and see significant progress. Learning to sing is a rewarding experience for everyone. Many children like to sing, even from a very young age, and people of any age can learn to sing, even with little or no previous musical experience. The best age to learn to sing depends less on physical maturity and more on factors such as self-motivation, available practice time and ability to concentrate.
The worst thing that could have happened was a reaction like “Sorry dude, but there is no way you can learn to sing. That's because maybe someone said that you sound like a dying cat, or that you're too old to sing. Doing so will broaden your horizons, increase your musicality and establish your identity as an artist, not just as someone who sings by chance. Anyway, at the end of the day, you will only learn to sing when you study with a teacher and you will receive qualified feedback on your efforts.
And sometimes they can be a good start to try the water and find out if learning to sing is something you're really passionate about. She also gave me group classes locally, and she also gave individual classes, and I studied with her for quite some time, until I moved to a different area. I also benefited a lot from my private classes, and my self-confidence as a whole person really grew. In addition, it is a lot of fun to have a community of like-minded musicians and will encourage you to continue taking singing lessons as an adult, once you see the results in practice.
Unless you're a full-time musician, you'll likely have to combine your lessons with work, study, and family commitments. Students starting singing classes should be socially mature enough to focus on the classroom and follow the training of their instructor. I completely agree with you, the six things you mention will never happen when you take private lessons. However, the human voice continues to mature throughout life, so students of any age can benefit from singing lessons.
If there's one thing I'd like everyone to know, it's that you don't necessarily have to have a passion for singing or speaking to reap the benefits of voice classes. However, learning to sing in classes with a supportive instructor can help resolve these issues over time and give students new confidence.