Hi there, Unfortunately with Blogger they don't give you much flexibility as to where you can place the ads. For blogs, the best position for ads is within the posts themselves, but from what I understand that isn't possible with Blogger. Your current placement works well -- I'd first focus on building more content and traffic to earn more.
its all depends on traffic and the unique post you post on blogs.top placement is fine.you can put adsense box within the post and see .