Spirit guides are souls like you, just much older although they often still incarnate. Spirit guides are to make sure that you experience all the lessons you intended to have. They can give you a nudge via an intuition or a gut feeling. They do mistakes and naturally learn too.
Is there something like angels? [...]

This article will give you quite detailed view on angels. After reading you will know:
what angels are
why they are here
where you can use their help
how to connect with them
how to raise your vibration
how to work with them in a daily life
famous people in that field
General Description
Angels are beings that vibrate on much higher frequency than [...]