I think you should go for it. There is no pressure – you don't get fired if you don't blog often enough! I follow blogs that are updated almost daily and some maybe quarterly, and I'm fine with that. Readers can subscribe to your blog and get notified when you update it. I have a long list of blogs I read, and I usually check in once a week.
I have a blog of my own, and I update it when I complete a quilt and want to write about it. I see that most bloggers go through phases of being gone from their blog because they are busy in real life, and I think that's as it should be. I don't feel like they owe me regular updates; it's free reading, after all.
You can get introduced to a lot of bloggers at this site (and could sign up for it to have readers directed to your blog, if you want…):
http://www.quilterblogs.com