to be honest with you, if this is your very first grow, i wouldnt recommend lst'n your plants, get at least one grow under your belt so you know what to expect, and then try it. If you have a plant now that is getting up there, when the lower branches are long enough, lets say somewhere in the 3-5 inch range, clip those off and make clones, that way when your one plant now is going into flower, and you have one veg stage under your belt, simply train that clone.... just a suggestion, but you can continue to LST your plant now, but with mites and other things that may come up it could get a little tricky.