Should you learn Pinyin first?

Pinyin first, would improve your pronunciation.

Pinyin is easier,Chinese characters is are so difficult that you don't have to learn them.

Pinyin is easier to learn and helpful for pronunciation. I recommend that you can learn Pinyin first, if you want to enhance your speaking quickly. However, combination of pinyin and character will give you a more solid foundation of Chinese

Learn together.

Pinyin and Chinese characters depend each other and push forward each other. 
 

it would be better for you to identify words easily 

like when we try to master a second language, the phonetics will be the first step

Pinyin would definitely help you with your pronunciation. Pinyin first, but still you need to combine with characters.

Learning and correcting pronunciation (Pinyin) goes along with the whole process of learning Chinese, different pronunciation problems will be encountered from the beginning to the advanced stage.

Don't worry too much about what to learn in the beginning; practicing listening, reading, and writing development at the same time is the best choice, but that doesn't mean you should learn it well all at the beginning. If you are just beginning to learn Chinese, the most important thing is to develop an interest in Chinese learning.

Generally speaking, the westerners fell Chinese characters more difficult at the beginning, so don't be nervous about learning Chinese characters, you can spend more time speaking or things that interest you more. Of course, if you feel the Chinese characters are easy and interesting, you can spend more time practicing writing them at the beginning.  

Relax, develop an interest in Chinese learning, and keep learning.