Q:

How to start day-trading?  Any advice about software for beginner? 

I want to start day trading, but I am beginner and I need help. 
Is there some online tutorial?  I want to start with just 1000 dollar. 
Is it enought?  I find ninja trader software.  Is it good?  Or do you
know any better software for beginner? 

A:

Maybe learn a bit more before plunging in with your own money, buy some good books on the subject and on technical analysis.  Open up a virtual account and test your strategies first, develop a trading plan and include risk management in it, think about what the worst case scenario will be on each trade.  Learn about position sizing and where to place your stop losses.  A good book to start with is "Trade your way to Financial Freedom" by Van Tharp. 
$1000 is a bit small to start even if you use margin, because one bad trade can wipe you out, or even worse, you could lose even more than your $1000 if using margin whilst you don't know what you are doing.  Whilst you are learning about trading and technical analysis save up some more money.  I would use a minimum of $5000 and preferably over $10000 if using margin and at least $20000 without margin. 
Also one other thing, day trading means you will need to spend most of your day in front of your screen, will this interfere with your day job and will you be getting enough sleep?  You need to be trading with a clear mind.  There are alternatives to day trading, position trading and swing trading to name 2.  You will be in a position from a couple of days to a couple of weeks in these type of trading and you won't have to be in front of your screen all day.  You can spend one or two hours per day after market close to place new orders and manage existing ones, that way it won't interfere with your day job or other daily activities you do. 

A:

$1000 is certainly not enough cash to begin to day trade with.   Brokerage will eat your bankroll, even if you do manage to do well.   If you can get cheap brokerage (say $5, which is lower than any I've seen) you're still wasting 1% of your bankroll every time you trade in and out.   Given that on a good day you might make 2-3% on your day trades and on a bad day lose 2-3%, what you're really doing is paying the brokerage company to have some fun on the market. 
Successful day trading is mostly a myth peddled by people with books to sell.   You're actually much better off in the long run just sticking your money in an index fund.   
Or betting it all on black.