It would help if you describe exactly what you want to do with that image. It is blurry because of size (small) format (jpeg) and most probably some prior scaling.
Do you want to keep that size 195x259 pix? and maybe sharpen the image.
Does SD to HD mean you want a larger image? Plenty around in larger sizes Google search result see: https://tinyurl.com/y5z846zm
That will be better than upscaling your small image.
Can you give your Operating system and Version of Gimp. The questions are there for a reason, so that someone, somewhere, maybe can help you.
Do you want to keep that size 195x259 pix? and maybe sharpen the image.
Does SD to HD mean you want a larger image? Plenty around in larger sizes Google search result see: https://tinyurl.com/y5z846zm
That will be better than upscaling your small image.
Can you give your Operating system and Version of Gimp. The questions are there for a reason, so that someone, somewhere, maybe can help you.