[Water Warrior 2]

Just a female newbie. Not a problem. We get a lot of newbies of both genders searching for answers to questions. You likely need to charge the battery to eliminate the lack of power first. A Battery Tender is a small smart trickle charger ideal for bikes. A great investment for all riders.
Getting back to the fuel switch. There is a vacuum line and a fuel line on it's back side. One goes to the carb and the other to the engine vacuum source. If this V line is brittle or hard it may not be sealing properly at either end. It may have a crack in it as mentioned earlier. You can pull it off and use it as an example at your local auto parts store and they will have a replacement for you. What they need is the diameter and will cut off a proper length for you. Make sure you specify vacuum line.