I'm new to this whole spirit guide thing, is there any way to contact them or to receive a sign from them?
There are lots of ways. Here are some of them:
-Directly ask your guides, out loud and clearly that you would like some signs, and make them very obvious please. (These signs, for me, tend to take the form of number sequences, or suddenly stumbling upon certain imagery all the time, like seeing unicorn pictures and unicorn themed stuff everywhere when this wasn’t the case before.)
-Divination: using divination means yourself or asking someone to do a tarot/pendulum/scrying reading for you, so you can ask your guides whatever you want to know. (Gentle reminder my free readings are open, if you need one.)
-Meditation: you can meditate on your own, or you can follow a guided meditation. Youtube has many guided meditations about meeting your spirit guide/guardian angel/ancestor guide/animal guide/etc.
-Ask them for guidance through dreams, if you’re good at remembering them and deciphering them.