Hello hello there!
Sorry this took me a bit to get to. I’ve been busy at work and such.
Now, let me answer your questions based on what I know and personal experiences.
1.) Do you have to take an oath?
I personally don’t believe that you have to when it comes to being Pagan, although, there are several traditions that say you have to take an oath, or be “sworn in” (so to speak) by a higher up.
2.) How exactly do you find your deities?
Well, that can take some time. It took me a little bit to find the ones that I work with. You can work with many Gods and Goddesses, and then still have you patron and matron.
I would suggest doing some research on certain pantheons that you are interested in and learning about the gods and goddesses that you think you might want to work with.
It may take a bit of time, and really, there is no rush. Just make sure you are happy and comfortable with what you are doing or what you are wanting to do.
3.) Anything else?
The first thing I always suggest to people is to read. Reading is the best thing to do when you are trying to learn about a certain subject.
~*Here are some helpful links to possibly help you get started*~
Deity work, altars/shrines, and offerings
How to write your own spells
Herbs and their magical properties
Again, I hope this helps, and I’m sorry that it took so long for me to get to!
Let me know if you need anything else. <3