You can lead a horse to water but you cant make her vape it
The sentiment of someone wanting to explore the possibility of a smoking alternative is huge. When I show it to someone I tell them about how big of a change I have had in a short time in my breathing and also mention how much I have not spent on smokes then let them ask for more information before going much further.
As far as "How to vape" this is something I paid a lot of attention to when starting trying to figure what worked in technique for what hardware. Everyone is different on this so it is impossible to just say do it like this or that not to even mention how differently one piece of hardware acts next to another. I like big hits of something like waffle that you can chew on the exhale but my high nic
tobacco flavor would knock me over with a hit like that so it is naturally not nearly as long or deep of an inhale. Just takes a little time to figure out what works then becomes pretty natural.
Hopefully your girlfriend will pick up on it with you simply because it is the easiest way to completely quit smoking and there is no argument doing that is greatly beneficial to your health, no idea of how long a smokers you guys are but I have found that more of the people who I have gotten to give it a serious try have been long time smokers who are really starting to see how damaged they are from smoking and those who express absolutely no interest are younger friends/family who have not quite got that smokers cough down pat so they probably figure they have plenty of time smoking left.
I also do as you mentioned in taking care of a lot of fiddly stuff for my wife. I try to make sure she has a fresh fill of her favorite
juice and a regular tobacco cartomizer for when she feels she needs a little more. I have also spent countless hours researching to help us along on the DiY because she and some friends like the "Lab Party" where we sit around the table and mostly make stuff we cant vape but every once in awhile we hit a winner and add it to our list of recipes. Lastly is the suggestion already made in buying a variety of different cartomizers ect... in the hopes something will really strike her fancy and up her interest in giving
vaping an honest shot at replacing smoking in her life.
Again best of luck for both of you.