how can I into philosophy

Most of the primary texts are probably too dense for a first time read. I got into it in college when I had the luxury of post reading discussions led by PhDs. I'd suggest before embarking on first time reads of primary texts that you read secondary and tertiary texts to understand before diving in. Thus Spake Zarathustra is a good read but it's more a novel than it is a philosophy book. It's easier to understand as a novel but very hard to understand as a philosophy book.

The works of Albert Camus would be much more approachable from a babby's first philosophy perspective. Though he writes a large volume it's easy to read because he's a good novelist and the philosophy itself is very life affirming and beautiful. Understanding it in its entirety would involve reading the greeks though but you can save that for later on down the line.