If i translate your words into English word by word, then it becomes like this Because I *자신(myself)에(place/location marker)* like a free trip plan. When i replace a customer with an employee, I help others better with my understanding. It is hard to understand what you want to say

"자신에 자유여행 계획을 좋아하기 때문에 제가 소비자를 종업원으로 바꿀 때 이해심을 바탕으로 남을 돕는 것을 더 잘 합니다." It is not immediately clear but my guess is that you wanted to say something like this: 저는 자유로이 계획해서 여행하길 좋아하는데, 이 같은 여행 소비자로서의 입장을 종업원으로 바꿔 생각해 보면, 저는 이해심을 갖고 남을 돕는 일을 잘할 것 같습니다. Or, 저는 자유로이 계획해서 여행하길 좋아하기 때문에 [좋아하니까] 이 같은 여행 소비자로서의 입장을 종업원으로 바꿔 생각해 보면, 저는 이해심을 갖고 남을 돕는 일을 잘할 것이라 믿습니다. => I love to travel on my own planning, and if I imagine myself as a travel agent instead of a travel consumer, I think I would excel at helping other travelers with an understanding attitude. (That is, you'd do well because you have a first hand experience and passion for traveling on your own) In your sentence, 바꿀 때 is too rigid sounding. It should be 바꿔 생각해 보면, 바꿔 생각한다면, 바꾼다고 (가정)하면, and so on. And if you have a hypothetical phrase like 바꿔 생각해 보면, you should end the sentence with a supposition, like -ㄹ 것입니다 or -(이)라 믿습니다.

If i translate your words into English word by word, then it becomes like this Because I *자신(myself)에(place/location marker)* like a free trip plan. When i replace a customer with an employee, I help others better with my understanding. It is hard to understand what you want to say