Hopefully you have juice. Even after doing the above, it may still taste bad. And I recommend if an empty dummy cart came on your atomizer, use that instead of tainting a stuffing-filled cart with primer taste. if it still tastes bad then mostly vape that off without inhaling. Then blow out again, primer again, vape off without inhaling but check if it tastes better, etc. Until it tastes fine.
And note - the bit of white under your atty bridge belongs there. It's not a piece of napkin or a piece of stuffing. It's a wick that brings juice from cart to atty coil.