I think you should go for it! I would subscribe I am always looking for more illustrators on youtube who focus on the journey and freelance side of being an illustrator rather than being an 'art youtuber' who does challenges etc (though it's fine to do that too! I just like to see a mixture). I think it's interesting watching someone grow as an illustrator so I don't think you need to wait till you feel like you are more qualified.
I think it would be a good idea to make a list of all the sorts of videos you want to do, maybe film and edit a few before publishing them. Then you can decide how often you want to post and already you have a backlog of videos so you don't get too stressed in the beginning to meet that deadline
I love the idea of making Youtubes videos and recording and sharing my journey in that way, but I am definitely too shy and feel like I don't have anything valuable to say! I also wouldn't like to be on camera and don't like hearing my voice/accent on camera haha! An old friend from university recently started making illustration videos and I love watching hers