ok I am working on my first grow, I have made all the newbie mistakes overwater, nute burn, strtchy plants because the lights are too far etc.....

I have to do an economy grow setup, so I am doing soil (bad walmart stuff) and some cfls and some nutes, thru it all I have had one plant survive we are at about day 40 24/7 light schedule, it took some time for it to really start growing, once I corrected some of my mistakes, now getting water ph at 6.5 with some dechlorinator in it ( wasnt doing either before just straight from the tap) no nutes because I am using the mg soil with nutes in it, thus the early nute burn, I have the one plant under 4 100w cfls and one flourescent grow light,

My question is I dont know the sex yet, since it is my only surviving plant I want to sex it and then take a clone if its a female, can someone walk me thru the process please, should I flower now wait for it to show sex clone and then go back to veg on the clone and the mother??? help me out guys