How can I practice speaking in Finnish?

The best way would be to participate in a Finnish course or a Finnish Club. You could try to find out if there is such activity in your home region. Here is a list of Suomi-koulut, your can check if you find help there, https://suomikoulut.fi/mika-on-suomi-koulu/maailmalla-toimivat-suomi-ko…. You could also search for Finnish Courses online. Here is a collection of webmaterial for Finnish Studies, https://www.makupalat.fi/fi/k/all/hae?f%5B0%5D=field_asiasanat%3A66571&….