>>57417
>my only option is linkedin
make a list of all the companies and research institutes / labs somewhat related to your field (especially if it's just 3 months it will be really hard to find something meaningful anyway, don't hesitate to extend the search to tangential fields) and spam everywhere, spontaneous applications are also ok, linkedin account is not 100% needed, more important good cv, cover letter, any recommendation you can get (e.g. a prof. from a class in which you did particularly well)