Porcha, don't give up!!!!!!!!!!!! We all lose plants or seeds at the beginning. We all make mistakes; how else are you going to learn?
Is this a cheap hobby? NOOOOOOOOOO!!! But figure out if it's cheaper than what you were paying for weed that won't be near as good as what you can grow yourself. If you are growing outdoors, you have to deal with the shit that goes along with it: insects, heat, humidity, mold, etc. An indoor environment CAN be much more controlled, but you have to have the right lights and you have to be able to manipulate the temperature.
And if you don't want to buy that mister, don't buy it. Just use a clean spray bottle. Just make sure you thoroughly douse and drench the leaves underneath as well as on top. And you'll prolly have to do it more than once.
Growing cannabis is probably SLIGHTLY less work than having a month-old baby...