Which OPK's?

Hey all you gorgeous ladies!!! My husband and I want to TTC soon and I am wanting to get anything and everything I'll need. I'm a TTC newbie! I've heard it's smart to start tracking my ovulation but I don't know what ones to buy. I'm mainly looking for strips that are too expensive. If you gals have any recommendations please comment and tell me about them.

Also can you:

Take a picture of them (so I can see the brand and what they look like)

And where I can get them at (amazon, etc.)

If there's anything that's worked for you to conceive your beautiful little bean please let me know! All info will be welcomed and appreciated!

Thank you all so much!! You're so very helpful.