I'm a music lover and love to sing. But I can not control my breath while singing, so I joined some singing classes and collect some tips. I share it here for helping people who love singing.
[img="https://www.sing.plus/wp-content/uploads/2017/11/wallpaper3.jpg"]Mixed race teenage boy strumming guitar[/img]

1. Vocal Fix
Try singing the vowels A-E-I-O-U frequently .
This helps you Shape Your Vowels When Singing.
Your aim is to ensure that your jaws stay wide open to the same position on all your vowels for long.
Practice this several times before it becomes natural the more you do, the sooner this new movement is adopted into your muscle memory.

2. Maintain a medium volume
Forget about the myth of singing loudly to establish a good vocal tone ! No !
A Good tone happens when vocal folds are strong enough to have a good closure but not touch.
This can be achieved by singing at a volume that one is comfortable adjusting the notes without force , alongside comfortable breathing.

3.Add a Natural Vibrato
You might be wondering how?
This is the way,
Stand ; press on your chest with both hands, raise your chest higher than normal ,take a breath in and then exhale, but don’t drop your chest and sing one note.
Hold it as long as possible don't forget ,with your chest raised.
Relax the back of your neck and keep your jaw open as you’re singing “ahhh''.
Please note :Its proven that too much use of vibrato is not a good thing in contemporary singing (pop, rock, and R&B) .Try to balance and you will achieve the perfect sound in your music.

4. Don't force the high notes
When you need to hit the high notes , don't try to tighten up.
Relax and let your voice go up smoothly while maintaining vocal control .
If you make a mistake of forcing your voice high you end up hitting bad notes and sounding weird.
Now you know, don't try so hard keep it controlled.
Lastly don't forget to allow emotions flow, mean what you sing.
Stay relaxed and confident .
Now you are ready to face the music world.

BTW, you can practise with an free karaoke app on you phone which may help you a lot.

Recommend: singplus (totally free), smule (pay for more songs)
Music is medicine to the soul ! enjoy great singing.