My AdSense Application Got Rejected Please Help!

When an application is rejected by Google, the first thing you need to do is check the email that indicates the disapproval. It contains more information on the exact reasons for disapproval.
If your Ad Sense account is disapproved, do not fret. It is not the end of the world. You can earn money on your blog in many more ways than one. Having said that, here is how you can deal with a disapproved Google accounts.
You can always reapply for the AdSense.
As it appears from the communication from Google that your site does not have enough content. However, as I could check your blog, I found that it has some good articles posted on it. I would advise you to improve on the relevance of the content you are posting. Not that the articles on your site do not carry any value, however, focussing on more vibrant and viral content can be more helpful.
Though Google does not specifically indicate the matter in clear words, it should be noted that traffic is an important aspect. Make sure your content has good traffic. There are instances where Google has approved the AdSense application of the sites that look average, but carry a huge traffic. Focussing on viral content can be a good strategy.
Also avoid using other Ad Networks till your Google AdSense account is approved. Also change the theme of your site to a more relevant one. The information contained in the email you shared succinctly indicates it. Improving the visual appearance of your site will be a good option.
And yes, never resubmit your application in quick succession once it is disapproved. Give yourself enough time to make improvements and reapply after at least 4 to 5 months.

I visited your blog recently and cross checked the detail as per your statement that was received from Google, as below;

You have around three posts only and it is not sufficient. You need to add more posts in order to get the easy approval. Design, layout and others are simple and nice.

The other detail for, as below;

"offer rich and meaningful content, receive organic traffic, and allow us to serve well-targeted ads to users."

Which clearly says meaningful content, it means your blog content or each post must be very well written with the quality and that must be very useful to the visitors' search and requirement per their keyword input result.

Second, it says 'receive organic traffic', it means your blog or its content shall receive the daily reasonable traffic from the major search engine like a natural traffic than social or artificial one.

The third one is, the content must be rich and unique which the AdSense and Bidder's (Advertiser's) requirement shall meet from your blog keywords / content to display their ads on your blog to generate ad click, visit and generate potential target viz. lead or sale etc.

General note: Some of the bloggers commonly does few mistakes while applying for AdSense, one is, they won't mention their brief profile on blog, second their blog won't have enough quality content, third their blog won't have any reasonable natural traffic regularly etc. etc. thus the issue occurs while reviewing AdSense application. However, try to find out other missing points like three to six months completion of your blog and on as checklist before applying for the AdSense.

Also, nothing to worry in case if you get rejected from AdSense again and you may apply after few weeks or months. There are other ways to earn online as well other than Google AdSense, so, learn it slowly and get it done accordingly.