I just purchased a Riva on a recommendation. It is my very first attempt at this e cig thing. I am trying to switch from regular cigs. Well call me dumb, but I have no idea how to fill it. I have empty filters, an atomizer and the battery. I have no idea how to fill it and get started. I tried searching for a video, but they were not riva style and just confused me. I swear I am not usually this useless. Please help!! TIA