I just wanted to add a little something as I noticed on another thread funnybunny that the uses of the term flushing is causing some confusion. There's 2 different methods of flushing. One method is that which CanGroIt writes of and is typically used if necessary during the grow as a way of correcting issues and removing salts from the soil. You use a large amount of water (2-3 times the pot size) and water this all through slowly but all in the one watering - not over days.

Flushing is also spoken of as the period of time at the end of a grow (the last week or 2) when all feeding to the plant/s is stopped and just plain water is given - but given in the normal way and amount when the plant needs it. Some people though may continue with giving molasses or some other bloom booster. This is done again to remove nutrients from the soil, chemical residue (bad tastes and unhealthy) but now its also to continue nudging the plant into dying and putting all efforts into her buds.

I hope you will try and continue on with your little girl. You did get left with a somewhat inadequate set up and it will take time and money to correct but like you said it is good experience and a good prod to get into to learning more. This forum has everything you need to know to get started, and to go on with for that matter. The people here, combined with the stickies, grow logs etc etc are an amazing resource. We're very lucky.
These plants are so enjoyable to grow, quite additive, and the challenge to do it indoors - playing god in a very small way - keeps you on your toes.
All the best and a belated welcome