I would suggest take it very slow and dont invest emotionally.Be friends and see how it goes.You might need some time alone after divorce if final.
Welcome to board! My fiance is 13 years older than me, and has done the whole marriage and kids/stepkids thing. In a way that was intimidating to me because I felt like he has been there/done that.
I have been backing off in response to him, not pushing things.