I would highly recommend checking out Agora Desk. This is a Peer to Peer (P2P) solution which allows you to trade Bitcoin with cash, bank transfer, gift cards and more with people who are local to you. It has a secure escrow system and a solid reputation system so that you can be sure that you're dealing with someone professional and trusted by people who have traded with them before. This is by far the best way to go about buying Bitcoin, as it retains your privacy and prevents you from having to jump through KYC hoops that all centralized exchanges will force you to use.

After you by Bitcoin, you can swap to other chains and currencies by using decentralized protocols. These days, centralized exchanges are a choice if you search hard enough!