I have just started trading, what do I need to keep I mind?

I have just activated my online trading account with my broker. Please let me know if there are any basic points I need to keep I mind as an online trader in the market?

My broker tells me that I need to develop an investment mindset. What does that mean? Does it mean keeping cool or being brave?

I will be applying for a gold loan as I need some liquid cash urgently. Is there anything I need to keep in mind before I apply?

Do I need to keep actual proofs for all my tax deductions claimed?

Since I have soft copies of my returns, do I still need to keep hard copies of returns?

What are the 3 basic things I need to keep in mind as an intraday trader?

Why do I need to convert a big expense into a loan if I can just pay it late?

I have just started as a intraday trader. Have already lost 40% capital by just either keeping the for too long or exoting too early. What should i change in order to be back into the positive side??

Why can’t I just live on my savings post retirement? Why do I need to plan my finances for post-retirement?

As an intraday, can you tell me some basic things that I need to be aware of and always keep in mind?