make sure u get a thermostat / rheostat or dimmer to control that UTH (undertank heater) and yes, stick ons are notorious for being HORRIBLY inaccurate.
i would wait a week anyways to let her get used to her enclosure before a feeding attempt. that way, she'll be hungry (which could increase ur chances of a successful feeding), and hopefully she'll feel more secure.
EDIT: the BP is not a climbing snake. it could potentially harm the snake if it climbs and falls. u can always swap that out for some nice looking foliage! looks nice, AND it can clutter up an enclosure to add bonus security!