You can't use a graphic card to mine Bitcoin anymore, those days are long gone...
That's true, but you can still mine altcoins and then sell them or exchange them for bitcoin if there is a market for it. There are platforms like Nicehash that still work. How profitable that is with the current worldwide electricity costs is a big question though. You mine an altcoin and the site pays you in BTC. But be ready to lose a decent share because of their fees.
the distribution of bitcoin block rewards which is getting smaller every year makes btc miners have to upgrade their mining machines with new and expensive CMIIW, so those who want to focus on becoming miners (what I mean here is altcoin mining) can see
this article -> I think the best way to start is to read a bit, research and start investing. The only way to understand how the market works is by actually being part of the market. Good luck.
Becoming a profitable investor in the market is not an easy matter, there are many things to go through, starting from learning - DYOR - and even making the right decisions (buying and selling), everything must be done properly and correctly. lastly, don't be rash and greedy because time can't come back, if you make a mistake in investing (especially if you buy shitcoin) then time will be wasted, focus on investing in bitcoin, it's more certain.