This is an eighth note. It lasts for half a count. There are eight eighth notes in one bar of * time.
When eighth notes are joined together the tails are replaced by one beam.
When you begin playing songs containing eighth notes, take them slowly at first until you gain control of all the notes. Once you are comfortable with the whole tune, gradually increase the tempo (speed).
Since there are more notes now, you may need to breathe every two bars at first. You do not have to wait for a breath mark to breathe. Most sheet music does not contain breath marks so it is up to you to decide the best place to breathe.
Here’s one using eighth notes in ^ time. Remember to count to yourself as you play.