I think it took me a while to get used to hardware having tried a number of devices; an arc 4, some pen thing from a filling station, a 50w pen thing from H&M and a smok osub mini a colleague passed on. I eventually quit proper with a T18/T20 and then an ultra 150.
It’s a struggle (or it was for me) to quit proper, it took maybe 2yrs on/off before I finally packed it in. The change from a cigarette to an e-cig is straightforward for some and less so for others. Then there’s liquid, coil changes, leaking, charging, dry hits, malfunction of kit etc to contend with. None of the aforementioned really occurs with tobacco. Perseverance is probably the key.