Help with moving world files from bedrock to java server

Hey all. I'm attempting to add a file from a bedrock server to a java server, but I'm running into a few issues. I download the .mcworld file from the bedrock server, and use an online converter to change it to a .zip file. I then upload the .zip file to the java server. I get the dark grey loading bar, but, once the loading is done and i open the server, nothing has changed. The world name doesn't change either.