Hello Mrs. You should know that combined contraceptives (with estrogen and progesterone, such as Nuvaring) can increase the risk of thrombosis beyond the age of 35 in women who smoke 15 cigarettes or more. The absolute risk remains low compared to the general population, but is still (somewhat) increased. In these individuals, a non-estrogenic contraceptive is more favorable. Since you tell me that you smoke 1 to 6 times a day, nuvaring is not contraindicated.
Although some sources indicate that the electronic cigarette could help with smoking cessation, several problems are present with this type of device: they reinforce the hand-to-mouth reflex, and their content is not regulated, i.e. we cannot know in many cases exactly what is in the device... in short, it's still the wild west for the electronic cigarette or vapoteuse, for the moment.
In conclusion, it is always better not to smoke, but I understand that this is real life and that it is easier said than done. If you ever want more information on smoking cessation, pharmacists can prescribe you different replacement therapies (gum, lozenges, patches, mouth spray, etc.), with a schedule that will be personalized to you. I hope this answers your question!