Hey colem8 howzitgoing.....
to fertilise a female plant with a male plant is not too hard.... 1st you need your plants ,,,so you throw the lights on your seedlings..((that have been vegging for at least 6 weeks or so.)) into 12/12...after between a few days and 2 weeks you should see how many male and female plants you have....at this point I would take out the males.....I put mine outside sometimes but if its the wrong time of the year you can put them/it (( I pick the best one)) in another room..... then when the female/s buds are starting to form I will take a couple of the bottom branches and fertilise them with the pollen I have collected from the male....how you do that it watch the males flowers carefully,,you can tell when they are about to burst...you carefully pick them then and put them into a paper bag.... I collect heaps of flowers and break them open in the bag... after you have a few in the bag you can either take a small unused paintbrush and gently cover it with pollen from the bag and gently "paint" the pollen on2 the buds or you can take the bag and put it over the branch and kind of gently shake it for a minute...then take it off.... ((that way is messier and will fertilise the surrounding branches a little as well ..... you can also store pollen ion the freezer,,but you need to dry it out for a few days before you freeze it ....
of course you can just leave them all in the room together and you'll end up with a whole plant covered in seeds.... but one descent sized branch can produce 100 seeds or more
you don't need to feed them anything other then your usual bloom food...and temps etc as usual...
good luck with that :^)