You don't need a spell to invoke a God or a Goddess. One simply needs to invite them to be present and hear you. You can do this with a chant or simply talk to them as you would to anyone that you respect and love.
However, such an invocation or invitation will work much better if you are very familiar with the Deity that you are calling upon and if you have already established a relationship with them. Imagine that you are a child asking for aid from a stranger, and then see yourself asking for aid from a beloved parent. Which one do you think will get the best response? The same goes with working with Deities.
im really new to this and I don't know what God or Goddess to get close to and to invite into my circle. I really don't know what I am as far as a type goes, I am learning about crystals and healing, and energy and light healing, I like reiki am interested in wicca, so what ones do I use or have on a personal; basis with that aspect of my learning. I am really open to learn all I can, any suggestions ?
Wicca has its own God and Goddess so you shouldn't really take deities from other religions and use them as the Wiccan deities. I don't know if the Wicca deities have actual names or if you just refer to them as The God/Lord and The Goddess/Lady.
I do know that Stregheria (which is a branch of Wicca) worships a goddess named Aradia. She is described as the daughter of Diana and Lucifer but I have a lot of doubts about this claim. Not saying Aradia isn't real but, well, Diana from Roman mythology is a virgin goddess for one. This branch of Wicca was based on the book "Aradia, or the Gospel of the Witches" by Leland which has faced some criticism. It seems Leland might have changed some things around or even made some things up so be careful if you look into that.
Outside of Wicca there's eclectic paganism which means you can worship multiple deities from multiple pantheons without (too many) problems.