if i turn off icloud, will it be affected if I delete pics?

I recently got a new iPad, and my phone had transferred all the pics to iPad and I don’t want that to happen. So now I turned off the iCloud sync on my iPad, but the pictures are still in my iPad’s album, will it be ok if I delete them all? If I do that will my iPhone pics or iCloud pics get affected and got deleted too? Thank you.