Live feeding can be done safely if done responsibly which mean
Never leave a prey un-attended in the enclosure
Supervise feeding
Feed an appropriate size prey
To switch you need to make sure the prey is warm enough, you will probably have to dangle the prey in front of your BP as well (use a pair of tongs)
Try and see what happen, it can take time to switch to P/K or F/T; also keep in mind that some won’t so you will need to be prepared to feed live in case your BP does not switch at all.