That tent is good for one or two 5 gallon plants. If youre not in an urban environment and have a safe place for your plants i would toss a few outside. But dont be too attached to those plants. Theres always more seeds. Im not trying to scare you but flower is a different animal. The plant needs different things and when it needs them it really needs them. Keep it simple, otherwise you might get yourself into a bad experience unnecessarily and it will leave you with a bad taste in your mouth. It will kill motivation.
Im not sure about that light. If you invest in anything i think it should be an
sf1000 or equivalent, which would do ok for two plants. Keep that light tho for veg.