I Can't Get It Right!

It's been a while that my new blog on Wordpress was up. And until now I can't seem to grasp how it works. I have been researching and researching for some tutorials on how I can have the same widgets installed on it too. Also, I still don't know how to add html codes. I am so frustrated! I have my own domain name but I can't seem to enjoy it because of my ignorance on Wordpress. Can someone help me please.....:-(