As you know, the traffic wasn't very convenient thousands years ago. So it was difficult for people to communicate with each other if they were far away from each other. Time goes by, we have a great number of accents.
People even can’t understand each other in their own accents if they are from different cities. For example, people in Sichuan province can’t understand the people in Shanghai.
Luckily, most of Chinese people are able to speak Putonghua. It’s Putonghua that you are learning.
So you needn’t to be worry that it’s hard to communicate with the people in other areas.
I’m from Sichuan .I’d like to teach you my accent,Sichuanhua.