Spreading information to people about bitcoin of course is a good thing to  do. However, their are some people maybe when you try telling them about how bitcoin investment works and at same time trying to convince him/her to go into bitcoin investment.  if you're still the first person to inform him about bitcoin investment  probably he might be thinking that you're actually trying to scam him considering how you're being so optimistic about it of course that's the feeling we always have sometimes when you're not familiar with something maybe you meet a friend who knows everything concerning that very thing you know when he keep telling you about that stuff at first you will be scared because that's your first time of hearing about such thing. More especially when money is involved you know people are always careful when it comes to something that will require puting our money. So I will rather wait for them to Walk up to me if they're interested, than spreading information about bitcoin because not everyone that is interested.

I think it is more of a philosophical procedure than something that can be applied, as you cannot be 100% certain of the direction of the market, and therefore if you wait until you get enough confirmation signals, the number of trades you make will be limited and there is no guarantee that they will be successful trades.

You can do more research to erase some doubts as you can never be too sure the days.  Based on their trading volume on CMC, they seem legit. WazirX BTW was founded in 2017, and an interesting fact about WazirX is that they were acquired by Binance, which adds more credibility to the exchange.

However it seems like they have encountered a big problem before as here’s what you can see on their website: ( so you can skip this one if you can't wait for their return).
https://wazirx.com/exchange/BTC-INR

And about ZebPay, it was founded in 2014 and it's still active til now.

I have not been mining but I understand the bare minimum and the infrastructure you need to get into mining.

You need to run the ASICs and have cheap power to power them along with cooling and maintenance to mine.

Considering the following facts:
1. Cost of buying ASICs and importing them to India. Note the pleural, you will nee a LOT of ASICs, not one.
2. Power is not cheap here
3. Ambient temperature throughout the year is warm, not cool.

The return will be from the coin you mine and how much you sell it for on the exchange.

... mining is not profitable venture to get into.

You could and should learn about mining from youtube channels out there and the Mining section of this forum, but it is much easier to buy and sell bitcoin for profit than mine it any more.