Actual Scientist here...
Safety wise:
Is vaping safe? Probably not.
Is it much less harmful than smoking? Yes, absolutely.
So while I would never encourage someone who didn’t smoke to take up vaping, I’d encourage any and all smokers to switch to vaping as a means of harm reduction if they fee they can’t quit. Obviously quitting totally is the best thing. But vaping is a harm reduction measure.
There’s recent research out that shows that even one fag a day is almost as bad as 10-20 for cardiac/stroke risks. Smoking is the single worst thing you can do to yourself health wise - half of all smokers die of it directly, and a big chunk of the rest are killed or harmed by causes related to/exacerbated by it. But you know that.
Definitely switch to vaping if you’re not minded to quit totally. Good luck