Lugols 5 % is fine; I have no idea about the website, but jump in and start with iodine, you will get help along the way here at this forum.
-two drops daily to begin with; which is equal to approx 13 mg of Iodine (6,5 per drop) is a good place to start, build up slow or fast to 50- 100 mg daily. Make sure you take all companions, as selenium, vit b and C, magnesium, Sea Salt etc.
Here is some info for you to read while you wait for the iodine; educate yourself; then you will feel safer about it.