If you are just starting Twitter it may be a little overwhelming. I will try to break down what you can do on twitter focusing on the main actions.
How To Compose a Tweet
How To Retweet
How to block someone on Twitter
How to create a list and add someone to a list on Twitter
How to Follow someone on Twitter
The main actions are shown in the following video and each type of action is broken down as you go down the page.
To Compose a tweet Click on the compose a tweet button on the left hand side of the home page. You are limited to 140 characters and below the composition box it shows how many characters you have left. It also shows a negative number if you have gone over. You can add links and media to the tweet. Hashtags also, hashtags are a way to have your tweet found using the twitter search and internal link function. Here is a quick video on how to compose a tweet.
How to Retweet
If you like someones tweet then you may want to share it with your followers. To do so simply hit the retweet button, then hit it again when a dialog box pops up.Below is a video and an example tweet, which is embedded so you can see the retweet button.
— David Chamberlain (@WiredWebDesign) November 11, 2012
Sometimes you may want to block someone on twitter. These could be for a lot of reasons maybe they are offensive or a spammer or even because they tweet to you in a different language.If they are harassing you then you may want to consider reporting them which is in the block area also.
Lists can be a great way to organize people you follow on twitter. It can help you sort through the endless tweets an an organized way.