Brainstorming ideas for new blog

I just recently looked into the idea of starting my own blog. I have always been told I am a strong writer, and I genuinely do try to believe in myself. However, I'm not certain if I'm good enough to be successful at something like that. I have searched for niche topics online to see what people started writing their blogs about, they seem to write about their field of expertise. I did not go to college, and am not certified in anything. Most of my work experience is in customer service. I thought to write about that, but thought that just seemed like to vague of a topic that I'll eventually run out of ideas to talk about. Although I dont have much knowledge to offer, I do have a lot of experience with life. Definitely not the most, as I am only 26 and still have much of life left to live. But I have experienced a lot of crazy moments, been brought through and can talk about life experiences for days and days - which can branch out into so many other topics. Does anyone think this is a good idea? Please let me know your suggestions, thank you :)