It's not necessary to read the stories in a particular order as they don't refer to each other very much. But I would suggest you to read this version:
https://www.mobileread.com/forums/showthread.php?t=12677
that has all stories in their chronological order in one place.
English isn't my first language either but I had no problem following the stories (of course, sometimes with the help of the dictionary). Just try it!