I am not new to singing as I sing in church on a regular basis and have recently sung in the choir for the carol services as a soprano par which I enjoyed.
Despite this, I don't think I am a particularly strong singer as I struggle to maintain clear tone at G5 or higher when it becomes breathy and thin. I understand that I am meant to sing with my head voice and that I should practise singing through a fake yawn.
However, I don't quite know whether I am doing it right and I'm pretty sure that it's not something that I can just do at will straight off without proper training and practice.
So, what I'm trying to ask is: What am I meant to feel when I manage to sing in my head voice if I do it correctly? There are many videos on youtube on practising strengthening head voice like doing lip trills, saying "whop" to arpeggios etc but how long will it take for me to see results of these exercises and do they work? I know that I should just get a teacher if I want to sing properly but at the moment, it is not possible.
I would appreciate your advice. Thank you.