I started collecting Oracles out of need.
Do you know what you're trying to explore with Oracles? Sometimes defining your reason for wanting an Oracle can help
What do you connect with, or already have a base understanding of? You may want to stretch out and study something new, but there are many topical Oracles available.
Do you like cards or prefer branching to something like Runes, bones or stones? (some Oracles come in both formats)
Do you like a certain artist?
You may want to just stroll through the Oracle cards and see which ones get your attention, and go from there. There are so many variants.
Maybe if you select a few and then ask around on the thread how people found them, and what benefit, restrictions, favours etc, they see in that particular deck.
But maybe go with purpose and intention first - For what purpose do you want the Oracle to fulfill, and what do you intend to do, gain, benefit from it
There are a few Oracles, both made with cards or bones, shells or stones, which you can make yourself as well.
Just some thoughts ...
Have fun checking them all out
Blessings Elven x