In almost any country, a person who wants to buy bitcoins can use the exchange service. The largest aggregators of such services are localbitcoins.com and www.bestchange.com. You need to decide how to buy cryptocurrency (using a bank card, money transfer, electronic payment systems, etc.) and choose a right trader. Pay attention to the reviews. It is worth choosing a seller without complaints and lots of good reviews.
Terminals and ATMs are not very common of buying cryptocurrency. The ATM list is on the site CoinATMRadar.com. Such devices are easy to use. Just a few operations will be enough for your cryptocurrency to be credited to your wallet. Terminals work with cash.
In addition to the mentioned methods, many countries have their own unique ways of buying cryptocurrency.