most edibles here (legal status aside) are not made correctly.
unless the person making the edibles is well versed in concentrate making there is no way they can provide an accurate product.
if one is cooking cannabis in butter there is no way to determine the thc content. this is the method used by pretty much everyone here. unless imported or professionally made i would be weary.
a dose for someone like you would be good at around 10 to 25 mg. lower end to start as you dont want to get high. if you went to 25 you would get a relaxing buzz. pain relief and a good nights sleep. ????