Many of those "resteem only" accounts are just bots. I did a post on flagging them recently. I do not recommend resteeming often (you can see from my own blog, I don't do it all that much) because people will want to follow YOU and appreciate your writing. If all they ever see on your blog is resteems, they will have no way of knowing if you're a valuable enough writer to follow. My suggestion is to start now and don't stop. Don't compare your beginning to other peoples' middle or end. I've been blogging for 13 years. It takes time. Be patient with it and enjoy the process. For years, very few people saw my writing, but I was learning and getting better at expressing myself. That made it worthwhile. Today I get to enjoy some of the rewards of those efforts.