Domain buy

hey I'm new I was thinking to buy a domain and build a website and earn around 300$/month can you suggest me any website to choose and how to make 300$/month with a website

Think of something you like, something you know a lot about so you will be able to write some decent content. No offence but your English is not the best so id either hire someone to write a few articles OR if you have any native English friends that would be able to have a quick look over your work and correct any mistakes they can find.

As for monetizing the site it really comes down to what you're doing, if its legal, real traffic then Adsense would be a good way to go if not then things like CPA, PPD etc.. would be worth looking into. Have a look around the forum, plenty of threads explaining in detail how you can make some cash with a domain.

Good luck

Before you go buying anything check out the hundreds of great guides for newbies on this forum and draw up a clear
plan. Buy what you need and do not stop with it until you bank some money and execute the idea to it's full potential. Then try
to find a way to upscale it or move on to a better method with the money you made from the last one.

Pick a broad niche that you're really interested in. You'll be living and breathing this niche for a while.