You'd be surprised what people want to hear about. Humans are naturally voyeuristic creatures, so it's interesting to hear about someone else's experiences with something.
As for where to share it, add it to your forum sig, leave comments on other blogs within your niche, make sure you're pinging the update services, submit it to blog directories (there are a ton of them) and regular web directories, add your RSS feed to RSS directories (see
RSSTop55 for a good long list), and don't forget about your e-mail sig (an oldie, but a goodie).
I've already mentioned some tips on
what you can blog about. A lot of my consulting clients have the same problem, but each of them, after they develop a rhythm, have
more than enough topics to write about and they're addicted to blogging. So, give it some time, start slow (there's no need to burst out of the gate LOL) and let it build over time.
Hope that helps,
~ Teli