You don't need a new positive mindset. you already have it.
Like Jerry Seinfeld said when you were a kid, if someone's playing in front of your house they're a friend and then, "Do you like Cherry Cola? I like Cherry Cola too! WE'RE BEST FRIENDS."
There's your positive mindset, buried inside you, just get rid of the garbage that's covering it up.
That's step 1 of the 4 step Process