To be honest, this is just a simple question, even searching in Google will lead you to the answer you seek. Usually, if you search this on the internet there will be some exchanges that will appear and in those platforms, there will be some guides that may help you with your problem. There are many ways to convert your money into bitcoin like P2P, bitcoin ATMs, and the easiest way is through exchanges. Now the problem is what exchanges you need to look at exactly because there are some exchanges that are not good to buy with, so my advice in choosing them is to look for the most popular because usually, they are the trusted ones, they have the largest volume and has good security.