What would be a good racquet grip for me to start playing tennis?

I am beginning to play tennis and I like it. I am really unsure as to what size racquet I should be using. Is there some kind of rule of thumb for a starter racquet so to speak? If it feels right, is that good, or what. I know that they are all numbered 0-5. Any help would be appreciated. Thank you.

What would be a good racquet grip for me to start playing tennis?
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