What do you think about having your very first relationship being poly?

I have never been in a romantic relationship before. I’m 28. I have met someone that I like and he liked me too. However, he is already taken but has asked me to be apart of their poly relationship. I have absolutely NOTHING AGAINST is at all. It’s just I don’t know if I’d want to be apart of that being my first relationship. I want to experience a relationship with only two people involved.
But then I don’t know if that will ever happen.

what do you guys think? what would you do? Or feel about it?
What do you think about having your very first relationship being poly?
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