i'm sorry for your loss.
true the ouija board is a method, and you can personalize it with photo's and things she liked to try and contact her spirit directly, but the ouija board is a spirit magnet, and sometimes spirits will show up and claim to be that person because they are lonely and wish to talk.
you could try pendulum work, skrying, or meditation. painful as it may be, your best spot would be in her room as it has her energy inside it so it has the best chance of connecting with her.
the veil of the year is thinning, and contacting spirits will become easier [Samhain aka Halloween is it's thinnest point, and the best chance of speaking with her] research Samhain if you wish to learn more about the spirits and various traditions to connect with them around that time if you wish.