Im not gonna stop you, but give you one hint. Once you start making a blog. dont stop. All your worthless effort wiill go to waste, with that worthless effort continuing youll make it into something actually called effort.
Heres another, i noticed that you said you were working on other stuff too like those japanese music and stuff before, and that gave you an idea to start a blog correct?
Note: If you couldnt even continue with what you had before, i doubt your blog will do any better. There aint no such thing as topic getting dried up, all you need is effort to put something on there be it boring to others but interesting to few.
I dont mean to sound like an ass thats degrading your confidence on making a blog, im just saying. If you make a blog and want it to be successful dont stop.