One of the simplest (though not necessarily easiest) ways to get Bitcoin is to buy it using your national currency. To do this, you will want to sign up for an account on an exchange.
Which exchange you use will depend on what country you reside in. Different countries have different payment methods and regulations, so it’s difficult for exchanges to operate in many different countries internationally. You can consult this list of exchanges on the official Bitcoin website to learn what exchanges are available in your country. However, it may not list all exchanges, so you should also search on the internet for more.
Here is a list of a few exchanges you may want to look at:
Most exchanges will require you to verify your ID before you can actually transact. This is to comply with the various KYC (know your customer) and AML (anti-money laundering) regulations that most countries have nowadays. This also means that all Bitcoin you receive from that exchange will be tied to your identity, so remember that when transacting in the future. You may want to research mixing services so you can anonymize these coins and maintain privacy.
However, there are also various ways of buying Bitcoin without verifying your ID. For example, there are decentralized exchanges like Bisq that aren’t run by a centralized company and thus are not restricted by regulations. These methods sometimes involve slightly more risk, since if something goes wrong there is no support team to contact, but that doesn’t mean they are completely lawless either. There are usually arbitrators you can contact who will try to impartially resolve disputes.
You can also look to see if your city has any Bitcoin ATMs. These are becoming more and more common nowadays. Usually, they take cash and only require that you verify a phone number before you can receive the Bitcoin.
One more thing you might consider is buying Bitcoin with things instead of currency. For example, if you have an old computer or guitar or whatever else that you want to sell, see if anyone will give you Bitcoin in exchange for it. To incentivize them, you might even offer a discount over cash.