You don't want to have a soil or soiless mix with ferts already in it for your seedlings. Germinate them in wet paper towel...proably find some techniques around if you look, and after the bean has cracked....put it in a small container, either a dixie or beer cup or a 4" pot with only a mix like promix, or something you mixed yourself without nutes. By that time you will have researched everything you need to know to plant the girl in a more permanent home.

Cheers,