We are not able to assist with making your uploaded images clearer.
The quality of the uploaded image (on your landing page) is completely based on the actual image used and the device used to take the image.
You will need to make sure the image is clear before uploading, by ensuring you upload a High-Resolution image.
If using your own images (not professional ones) we suggest you google "How do I make images clearer?" and perhaps include the device you are using in this search (eg iPhone, etc) as it will greatly depend on the device you use to take the picture.