Hi buddy I watched the video and also the channel. Nice start. Yeah I could hear a tinny noise from your audio (a noise that I know very well and that bugged me a lot). I think I heard that you are using an headset so yeah maybe that can be the problem for the quality, but maybe also the video editor. What editor do you use? Because I was using camtasia studio and i discovered that the tinny noise came from the editor because there is a bug with the 48Hz frequency and I switched to sony vegas.
Also your banner is ok ( I'm not by any means a graphic expert so feel free to ask to others for that).
Also you created playlists so you already some notions about SEO I guess.
The only tip I can give is keep improving and doing more videos (maybe with a right schedule to follow, in that case your subs will now when you will create content and also I read that youtube tends to improve the visibility of channels that also have a precise schedule but I don't know if that is true).
Bye!
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