On the little research, I did that's what I got. Can you please point out where I can get more accurate content?
If you're looking for technical content, i'd recommend book "Mastering Bitcoin 2nd Edition" as starter.
Done are the days where you can profitably mine bitcoin using a graphics card. Today, you're just going to lose a crap ton of money (unless you have free electricity or something). Either you go with ASICS, or go mine something else and just exchange the mined coins into BTC.
@mk4 you don't read my comment very well, I asked OP to buy graphic cards and mine on Nicehash because this platform pays out in BTC, it's just like mining Ethereum and exchange to BTC every 24hours, I make 15$ per day mining Ethereum and I swap it to BTC.
While you could earn BTC that way, technically you're not mining BTC. What you actually do is using NiceHash as intermediate to rent your computational power.