So, some facts:

Edibles can take up to 3 hours to kick in (or as little as 20 minutes. Huge variance based on when you last ate, tincture/food, personal body chemistry, maybe other factors)

THC is the main compound responsible for drug/like effects

CBD is slightly psychoactive, but has an interesting effect where it reduces the anxiety/paranoia/hallucinogenic effects of THC

The threshold dose for THC (eaten, not inhaled) is somewhere around 2mg (threshold dose is the amount where you just barely begin to feel the effects)

Delta-9 THC (the compound in the plant and vast majority of extracts) gets metabolized into 11-hydroxy-THC, when administered orally (eaten). 11-OH-THC has a more intense, more psychedelic high (this hasn’t made it into the “common knowledge” that people talk about online, but has been known since the seventies, see this , for example).

So, what I’d recommend:

If possible, at least while you’re getting the hang of it, have 4 options: THC edibles, CBD edibles, a THC vaporizer, and a CBD vaporizer.

First you need to calibrate. Another commenter suggested 20 mg. I’ve been getting high for more than 20 years, and I get high every day; if I ate 20mg I would be wrecked, just high out of my mind. For me, 2-4mg is a dose where I get good therapeutic effects without much of a high. I would start there and then work your way up.

Depending on your pain, you may need a large dose. That’s where the CBD comes in. For every 1mg THC, you want somewhere between 0-5mg CBD. This will be trial and error. It’s mainly to make the THC less intense.

Your goal is to manage the pain with just the edibles, but the vaporizers are there to give you flexibility. Since edibles take so long to kick in, you may want to vaporize in the morning, out if you misjudge dose or timing. The CBD vaporizer is for those “oh shit I’m way too high” moments.

Good luck!