Thank you for your reply, but if it is not a platform, then what does it do? When you run a miner, then which data processed?

Personally, I prefer visual content and videos, so the best channel for learning the basics is https://www.youtube.com/c/aantonop.
You can search and find answers to the basic questions in these videos but you cannot mine bitcoins from your computer and mine something for someone with experience and not a beginner.

1-You can build apps around bitcoin but I believe you are confusing btc for eth. Btc is not really like eth.
2-Not really.
3-You won't see that happening but the miners will get rewarded with tx fees instead of block rewards and there won't be any newly freshly minted bitcoins.

Think of block rewards as a way of introducing Bitcoin into circulation without introducing too much that it would be better for people to mine than to use Bitcoin as a currency. We need both for Bitcoin to be valuable. We need people to be sending and receiving Bitcoin from other people because but if the block rewards were too high and offered too much incentive everyone would be mining instead of trading. When we have finally reached the limit of 21 million Bitcoin every one should be circulating Bitcoin around with trades. Transaction fees then allow miners to still earn but it will not be too lucrative for the miners because then people will not use Bitcoin as a currency because the transaction fees would be too high. The way Bitcoin has been designed is to make sure that there is balance and we are not injecting too much Bitcoin into circulation at the same time because this would have the effect that fiat currencies have with printing money off.

I'll just answered this one, as others have said the last bitcoin will be mine in 2140, so I assume everyone is dead by then. But you don't have to wait that long, in 2038, when "almost all bitcoin" has been mine then we will see what's going to happen to bitcoin. Maybe the price will shoot up, or maybe some miners are going to shift to other coins.

Why wait for 2038 if 99% of all BTCs will already be mined around 2030 (see @tranthidung post), and that 1% or 210 000 BTCs will be mined for more than 100 years. Therefore, I think that such a small amount that will remain in less than 10 years will not mean much compared to the 20+ million that will be in circulation by then.

Great resources, I'd like to chime in and add https://github.com/bitcoinbook/bitcoinbook!

OP, another link with MORE learning resources, https://bitcoin-only.com/learning-resources

Read them. It’s truly my belief that people who have access to the internet have no more excuse not to learn any topic that interests their intelligence.