I've been using CBD for about a year now. Spent a lot of time researching it as there's a lot out there and many of the sites just glance over the actual science and focus on marketing. I'd say within the first month it has made a noticeable difference to my anxiety and sleep. You have to be careful as not all CBD products are equal.
CBD vapes are actually one of the most effective means of taking CBD as it bypasses the the digestive system and taken into blood stream thus has a faster, albeit less lasting effect. I mainly use the vapes when I feel I need a quick solution (like when I'm about to do a presentation for example).
I also take water soluble CBD in a capsule which is so much more effective than CBD oil. If you're not careful, CBD oil in tinctures or soft gels can cost you a lot of money - to get the dose you need, you actually have to take quite a bit of it as most isn't absorbed into your body. So - if you're looking at CBD, I'd definitely suggest a water soluble CBD as it has the highest absorption rate apart from vapes, and does last much longer. Because of this, you don't need as much as CBD oil for example.
Regarding THC, as
@HLon99 mentions, this is something that I'd avoid personally. I agree with is said in that to can often be reached to for a solution, but could ultimately have an adverse effect.
Hope this helps.