emphasize on the words cause some words I couldn't understand. other than that sounds good. Oh put tension before hitting high notes so the listener won't freak out and get too surprised when you go high. https://www.bandlab.com/johnnyb1985
I don't have a problem with it. I say a little more vibrato but than it's your style to? it's a soothing voice to me.
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For the style and genre you seem to have what you need. In some cases just keep hitting that high note if you into this kind of music ?
I think you got the voice and the potentially to keep developing it. I also think your focusing too much in the mechanics of the song like your guitar n making sure your hitting the note right. I say sing from the heart , and put emotion in it. Try not to star at the guitar but the people your singing to. Keep practicing your breathing cause I got the same issue to.
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Voice Recorder this one has a very good rating, I myself use Samsung Voice Recorder and haven't had any problems using it, but looking at the reviews I saw that some people left a bad review so I dunno, hope it helps tho!