Keep the oral CBD to low doses. The epilepsy CBD medication approved by the FDA requires regular monitoring of liver enzymes. A number of the patients in the clinical trials had to withdraw because of liver toxicity. My impression is the doses were pretty massive. You should be OK as long as you don't drink the stuff. The fact that you can't get enough to hurt you by smoking it doesn't mean it isn't toxic in large doses. Table salt will kill you if you eat enough of it.
Not all lotions and ointments are created equal. I use a local product called Ugli Butter, that is CBD and arnica in a coconut oil carrier. It works pretty good on my arthritis. It works so good I tried to invest in their company, but they turned me down. They mail order, so if you want you can google them. I don't have any conditions that require me to use CBD internally.