Sorry about the life you had on your first marriage. Marriage loss and MC both things are quite devastated. And makes life quite difficult. We are often afraid to have a fresh start. Even sometimes when I think of the difficult times I had. I am pretty afraid to live all those over again. I seriously can’t afford to do that. Would you? Of course not!
But these procedures are much good in giving hopes. And yes the fertility clinic would find your surrogate. You don’t have to worry about that. Just go with the flow. Have a great life.