I just keep reading so much about them, and its hard to wrap myself around exactly who and what they are.
No one can really answer that for you. It is going to have to come down to your own personal feelings on the matter. That will be based on your own experiences. Everyone's experience is different.
My advise on researching deities is this; don't try to learn about them all at once, that would be overwhelming to say the least. Pick one or two to start with that interest you most.
Maybe you even feel called, or someone has reached out to you. Perhaps you feel a pull toward, or have connections to a specific culture or tradition. You could start there.
Then, go deep. I would suggest avoiding the new age or modern ideas of deity for the most part. I am not saying none of it has value, but much of it is someones personal imaginings or experiences, and can be very misleading.
Delve into the old lore and texts wherever you can, that can tell you an awful lot.
For example, if you want to know about the Christian god, read the bible old and new testament, perhaps the book of Enoch and such if you want to even go deeper. If you want to know about Muhammad, start with the Quran.
If you want to know about about Krishna, read the Bhagavad Gita, or Brahma, the Vedas. Those would tell you much about Hindu mythology and beliefs as well.
Sacred texts would be a great resource, at least a starting point, for studies in nearly any culture, religion, pantheon or system of belief you could want to read about. Here is the link; http://www.sacred-texts.com/world.htm
This may sound like a daunting task, but there really is no easy way as far as I am concerned. There is no encyclopedia that condenses all the useful info into one nice, easy to digest package.
Some may think that the old texts have no place in the modern world, and the roles of the deities have changed now anyway.
Perhaps there is some truth to that, but remember this; whatever anyone believes they are, they are without a doubt ancient and vast, and their roots go far and deep.
They do not necessarily care that the world has changed.
I am looking to understand what and who exactly God's and Goddesses are. I see so many books and articles and postings online that talk about them and inviting them to work with you and such and all of it seems like it's a bit of careless carefree musings without any real understandings, knowledge or backbone.
I am just very confused on all of this and I know the answer will vary person to person. Do people believe God's and Goddess are real entities? Do they believe they Were once human or living? Are they just names given to energy? Are they names given to energies that have become created as off branching of the God and God aspect of all that is?
I have a hard time understanding all of this so if there are any good places to read about this, I'd love to know!
I've read some Wiccan views but there doesn't seem to be much knowing there vs putting a name to something.
Thanks for reading!
Who and what one thinks they are of course will vary from person to person, as you said yourself.
In my experience and research it also varies from deity to deity, culture to culture, ect., further complicating things.
For some cultures for whom ancestor worship is the major practice, certain ancient ancestors have no doubt become gods and goddesses. Some seem to have been something else originally, such as a nature spirit.
I personally believe that some could have been powerful thought-forms, fed and maintained over many years until they become independent entities, possibly.
Some were very likely human emotions, energy or natural phenomena personified.
I do hope I did not just majorly complicate your search. I am sorry, but there really is no simple answer.