Where and how to start

I have been dilly-dallying about writing a blog long enough. It’s something to do with my age and time when expressing was not always encouraged , infact it was looked down upon where I come from . I did end up writing a book but to date I feel apologetic towards my work in spite of great feedback from some prominent people.
That’s our generation for you .
Almost two decades later I am suddenly grabbed by an urgency to write. And now it feels rather late in the day to start honing ones skills. Yet the urgency persists as one sees so many avenues, so many opportunities, so many mediums to express oneself.
I am still not sure how blogging works but I am determined to learn as I go. So bear with me while I find my feet.