Finnish higher education institutions offer a range of scholarship options for those non-EU/EEA students who are required to pay tuition fees.
Each university/university of applied sciences (UAS) has its own scholarship system. You usually apply for the scholarship from the university at the same time when you apply for admission.
Your first step would be to search for the degree programme you'd be interested in applying to. Then, you can check the scholarship options and procedures with the university/UAS offering that programme.