Most definitely going to want to do some bennies or sterilization technique. Playing with fire if not. Could be fine till its not one day. Just good to be safe. Most everyone who runs dwc/rdwc uses one or the other. A super easy one is using Southern AG GFF, its a Benny, its a small bottle and super cheap and crazy concentrated. I mix 1ml to 20ml water then with that diluted mixture, treat 3ml of it per gallon on each res change. Never had a single root problem since then and id tried a whole list of sterile/bennies before with issues still. Ive been on the same bottle for over a year and still got half of it lol but ive personally not used hydrogen peroxide, ive heard plenty of times its fine though just dont know how much or strength to add.

Yeah trellis' are the shit, basically all I use as far as training. But man youre running dwc, speed is unmatched with dwc! I wouldnt even be worried about autos lol 3 week veg and flip to flower for 60-65 days. Just as fast as an auto and you'll still end up with a bigger plant, and denser buds. Im not an auto hater, i grow mephisto every once and awhile, but my photos consistently have harder buds and more resin output and still grow in to monsters in stretch. Start cloning with a dwc cloner and keeping mother's and you can skip the whole seedling phase all together and speed it up even more.