If you're new to blogging, no matter how hard you try to rank high with highly competitive keywords, it's unlikely you'll be able to do so.
In this case, it's helpful to target keywords with high search volume but few blog posts (i.e., keywords with a small number of articles).
For example, if users search for a specific keyword and only two blog posts are available, writing a blog post using that keyword will ensure your post ranks at least in the top three, ensuring it appears on page 1.