Can I have help please??
You mean you want to buy Litecoin?
You need an Exchange that lets you trade Litecoin.
There are many out there: like CRXzone, Shapeshift, depending on the currency you use.
Shapeshift.io really works well. Or some bitcoin ATMs deal with litecoin for cash.
You should buy them from an exchange, not shapeshift.io and if it’s a low amount of LTC you can keep them there. If you’re planning on buying a bigger amount of LTC I suggest buying a hardware wallet to store them securely after you bought them on an exchange.
If you need more help with this, fee free to ask.