Not always.
You can plan your trade, follow good mm rules, study the market, etc, but for some reason the trade goes against you.
There is no one who can trade well in the first transaction in trading especially if you don’t have quite much experience. So, it’s important for traders to stick on the rule when they started to trade with real account. If you can follow trading plan well then your result of trading won’t be too much different with your trading in demo account. But mostly traders can’t control emotion in trading with real account. Some traders could be too hurry in making decision, some other could be too emotional with using high lot size to gain big profits in single transaction.
Yes. But I think a good traders knows the reason then.
Sure, I know that sometimes trend isn’t your friend, but the line behind you should see.
That’s the struggle of new traders. Their trading psychology (ego, emotion control, etc) is being trained in live account. I always recommend some newbies to make a small capital of live account in order to train their trading psychology.
Yes, you’re right. Newbie should learn about technical things in demo account until they’re ready to trade in real account. The easiest way to know that you’ve been ready to move into real account or not, you can look it from your trading plan. If you have your own trading plan and you are confident with it, then you could step into real account with low amount of capital first so you can learn the pressure in your psychology from low pressure and then increase it step by step.
I think that the first trade doesnt matter,
all successfull traders don’t let their emotions
to control the game.
When we are trading we must know that many times it is our trading emotions that can get us into certain unwanted situations and the best approach for us would be to get out of them as soon as possible.
And we should be firm in our trading based decisions so that our profits do not get affected 
Yes emotions play an important role in trading specially they are much involved in real trading on demo we not feel deep as we feel in real trading . Our first trade psychology is very exited and hopeful if we get profit it is fine and good. Loss make us bad in thinking. I must say first impression should be goos so trade with low risk so that you win low profit not loose much it will make you motivated.
Well, the first trade is just the beginning, the first steps. Why should you judge your future trading sucess/failure according to the way you enter the trading world? The beginning is just the learning stage. If you lose, you still need a lot of experience. If you win, you were probably lucky. It doesn’t matter, I think.