Does adding images helps SEO?

Yes... optimize your images with alt text (pit the main keyword in the alt text)

And make sure the file name of the image also includes the main keyword...

Add at least 10 images in your blog post and also info graphics...

Good quality Images, that have the URL with the right naming convention, proper alt text, yes they do help in SEO. Also, the brief image description that you provide, that tells what exactly the image is, will be very beneficial. Although Google cannot read the text inside the images, these alt texts and description that you provide will be helpful for Google bots to crawl.