Same, at first, but if I try I can conjure a vague / unspecific mental image (the harder I mentally try, the clearer the image gets, but it never gets anywhere

Same, at first, but if I try I can conjure a vague / unspecific mental image (the harder I mentally try, the clearer the image gets, but it never gets anywhere near perfectly clear). For example: Are you able to take a table in your house and then imagine a soccer ball on it? Or do you still come up blank with just the concept and absolutely no mental imagery?