There are a variety of ingestion methods now, edibles are common for people who do not wish to smoke. I would say titration is easiest with smoking because the effects are near immediate. You can take a toke or two and decide to wait awhile and ride it out to the level of comfort desired, or you can easily have one more toke. Edibles, once you eat it, you're in for the ride, which is where the "go slow, start low" saying comes from.
If you are smoking, go with flower, not dabs or cartridges. For a beginner, I like to recommend something with a THC level in the upper teens, the top shelf 28% stuff might be too intense. I'd also recommend more of an Indica leaning plant considering Sativa leaning plants have a higher tendency to increase heart rate and feelings of paranoia / panic.
With edibles, I generally suggest starting with 5mg edible. It really depends on the persons experience level with mind altering substances, their fear level of taking Cannabis and also their health related conditions. If a person is very worried about taking it and thinking they may overdose (which we know is basically impossible) I will often times give them placebo at first. If their mind takes over and they think they are tripping, I know it is all mental and Cannabis may not be right for them.
There are many more things I can expand on here, but in a nutshell, hopefully that helps. Safety first..... hence all the safety meetings
