How to start learning Chinese?
More than one chinese listed here.

Which one should be tried first?
Which one is the simple to learn?

Question

How to start learning Chinese?
More than one chinese listed here.

Which one should be tried first? 
Which one is the simple to learn?

Answer

Chinese is the language of PRC, means "pinyin + Simplified symbols"
in HK they speak Cantonese = "jyutping + Traditional symbols"
in Taiwan they use "pinyin + Traditional symbols"

choose what to learn depending on the location you need

Answer

Are you referring to Mandarin vs Cantonese? If so Mandarin is more popular, that's how I decided to learn it with respect to both of these.