Question for experienced couples

Wife and I are young 25m and 23f and we’re into the idea of me sharing her but right now we’ve been limited to just roleplay. Just curious about the opinions from people with experience would it be better to start with a bull that is closer to our age or an older bull? She likes the idea of both younger and older guys breaking us in so she’s not really picky as long as he’s a dominant guy that’s got some stamina!