Get Bitcoin
There are many ways you can get Bitcoin. You can buy a fraction of a Bitcoin, so don't let a high price per bitcoin put you off. Many people are #stackingsats (regularly spending a fixed $ amount on buying bitcoin, also known as dollar cost averaging), you can see that this method has historically been a good way of accumulating Bitcoin by looking at hodl.camp.
Buy (suggested)
Buy Bitcoin as you would buy anything else (without having to prove your identity). You may be able to buy Bitcoin at your local meetup or a nearby Bitcoin ATM.
Buy (other)
If you want to use KYC on-ramps (despite the risks) there are the following Bitcoin-only options which enforce taking self custody.
Mine
Long gone are the days that you could mine Bitcoin using common hardware. Bitcoin mining is now dominated by specialist hardware powered by low cost electricity. This video gives a simple overview. Read Diverterbtc's Mining for the Streets and Econoalchemist's Home mining guide.