Yeah, if you can understand Cubans you can understand pretty much any other Spanish accent.
Cubans are a special kind of Latino because they have been isolated by so long under the Castro dictatorship, i noticed this of Cubans too and also of Venezuelans recently.
Living under socialism just breaks a culture into hyper-individualized, cynical people.
When outside of Cuba however most Cubans quickly adapt to whatever country they are in.
Im not American, so i can't tell the experience of Latin Americans living up there, especially when all Hispanic-Americans i know are just my wife's extended family who seem to act pretty normally gringo to me.
I do know there is some friction somewhat but Latin Americans in general aren't very serious about their ethnicities
I think European bad blood tends to be more intense because Europe is made up of ethnicities with hundreds of years of existence and conflict, meanwhile American States tend to be very young with new ethnicities and identities that don't go back that much.
Latin America is very similar to America in that regard, but instead of being former British Empire, its former Spanish Empire.
In America you could have European immigrants that had centuries of bad blood between them, but in America while initially they may have formed cliques like Irish and Italians in the end they just lost their identity to become "white Americans" so you didn't had that inter-ethnic cruelty you see in the old continent.