There are many platforms available in the market but still MT4 is one of the most preferred one as most of the people still use it due to its user friendly interface.
Well it keeps on changing but you should check out what strategy fits you and trade accordingly you should always believe in your skills rather than copying others.
Ofcourse, its a good capital to start investing but the problem is that you should use it wisely and only invest when you are a bit experienced trader.
Yes it happens with many trader, who over trade in order to maximize their profits or recover their losses, its not good to do so as it might lead to fatigue or desperation.
I don't think its that easy to have a one minute strategy, the market is very complicated and its not possible to have a strategy that works in every situation.
Demo accounts are important even if you are an experienced trader you can check your trades here and if you are a new trader then you can learn trading without loosing your money.
There are many website and social forums where you can learn a lot, i am trading with liteforex and they have supported me well in my early days, so if you could open an account with a reputed broker, they can also help you in learning.
Most of the trader believe in the saying that, they can earn from the market very easily nad in greed they just jump in to trade without any planning and ending up losing.