The best advice you'll ever get regarding trading in general is don't ever risk what you can't afford to loose. Never borrow to invest and certainly never sell up one good thing to fund an investment on the markets.
Day trading requires a large lump of capital trust me, once you've worked out your costs and set your stop losses and paid everyone in between, then your left with your capital and your profit. You need to be trading in high volumes to make a good average profit.
Your best option is to start with a small amount of money that you could afford to lose in the worst case scenario. Spread that over 5 companies, a grand each say. Then monitor it closely, I once went to bed watching Regus "RGU" and woke up in the morning to 50% down, then sat there all day watching it slip further. A month later I was up about 120% but it was a very scary month
Take your profits from your 5 companies and use that to day trade, remember to take your capital back out. Then you're playing with money that's not yours to lose
Trouble is, when that playing money starts to get a little large you start dreaming about car's and motorbikes and panic and sell the lot before you lose it
Oh and one other thing, even if you have a mate on the inside of a trading room talking to you on the phone, you'll never beat the systems they have setup at their end and the volumes they trade in