First welcome and congrats on your new BP

While I understand that someone can have difficulties to feed live prey to a snake you need to be prepared to have to do so in the event your BP does not switch, some just won't.

Now when it comes to switching you need to take it one step at the time. Either switch to live rat first and than F/T rat or switch to F/T mice first and than F/T rat.

One thing I would recommend is for you to keep feeding live mice for at least 2 to 3 more feeding before attempting to switch to another type of prey.

Once he ate 3 to 4 meals successfully for you (1 meal a week)

You can try to switch to live rat and I would recommend 1 to 2 rat pups (rather then a small rat at first), if successful, feed live rats for 3 to 4 feedings before attempting to switch to F/T.

Or you can switch to F/T mice, if successful feed F/T mice for 3 to 4 feedings before trying to switch to F/T rats.