Hi Will!! great to have you here!!
If you keep your plant inside (thus meaning there aren't the largest amount of bugs to catch), here is a cool way to feed the plant...
First of all, remember to only feed a trap an insect that is only about 1/3 the trap's size...
Ok-with that in mind, catch a few bugs, maybe around your porchlight or on a window, and put them in the freezer (I usually use a cup with a tupperware lid weighed down on top to put the bugs in...it makes for semi-easy catching and freezing) Depending on the size of the bug, wait 5 to 10 minutes before taking them out of the freezer. They should be put into dormancy during this time, but, if not, put them back in for a few minutes. Once they are asleep, take them to your VFT, find a trap suitable for the bug's size, and ready the tweezers (tweezers are good to use although you have to be careful not to squish the bug when you pick it up)! (You want to do this as quickly as possible because the bugs won't stay asleep for long!) Drop the bug into the trap and sit by and watch! Soon the bug will wake up and the trap will go "SLAP!!" *bwahahaha* In a few more minutes the trap will "seal" and begin digesting!!
You always want to make sure that you feed your VFT bugs that are alive, otherwise, once the trap closes (if it even does) the trap won't seal and it will open up the next day. Since the trap can only open and close so many times, it is important to make every closing count!
Sorry for the novel here! Hope this helps!!