Right-click only on April.part1.rar and select "Extract Here" or "Extract to [Folder Name]" .
If the extraction stops midway, one of the parts might have been corrupted during the download. April.part1.rar
If you are missing a part, the extraction will fail with an error message like "Next volume is required". Right-click only on April
Are you of this archive, or are you seeing a specific error message when you try to open it? How to merge .part files using WinRar April.part1.rar
A single part like April.part1.rar usually cannot be extracted alone because it is one piece of a larger archive.