I'm putting this much effort in each and every one of my posts because these are kind of diaries/archives for me.

This is the best approach! If you can say from the bottom of your heart in a few days/weeks: "Yes, I like my own blog!", you've done everything right. You won't be able to please everyone with your blog anyway, there's no point in trying. I know you'll find your line and stick to it... :-))

I cannot certainly come up with brilliant ideas to write every day.

Who can do that? And who can write a good text every day (even without a good idea) if you're not a professional? Who can even write every day (write in such a way that it interests a reader) if they have a life besides the Internet?
Nah, nah, I'd much rather admit that to myself and take breaks (okay, okay, the breaks don't have to be as long as mine...). Posting every day just for the sake of posting only spoils the prices. Personally, I've already "unfollowed" various users because I had to scroll through (for me) uninteresting stuff in my feed every day. Well, my consistent habit of checking the feed every day seems to be antiquated by now. EVERYONE behaves differently here - and that's what makes the whole thing exciting and lively.