Thinking I’m not good enough for a guy

I started online dating and met a guy that I’m connecting with – He seems into me and wants to meet – but I’m getting insecure since he has a great job and makes a lot more money than me…and he’s really smart – plus he mentioned he’s attracted to “confident” women – which I don’t think I’m very confident…How do I go on this date without expectations, and just be myself without worrying if he will like me back?