Make sure to try different gauge wires. Story below--->
Response to question 1, I did not set out to be cloud chasing. My first equipment was a SS Nemesis Clone, Kayfun lite plus the version with two airholes by EHPro, 28g Kanthal, 18650 batteries, digital efest charger, evolve Kick v2, and some organic cotton. Wrapping a 2.0 ohm coil of 28g kanthal and setting the Kick to around 11-13 watts worked great for the Kayfun I mentioned earlier. It took me 3-5 builds and about a week to get there.
My vapor production never reached the equivalent of the production I saw on youtube videos, so I bought an RDA. Not to much success until....
In response to your second question, it took me two months to really create some massive clouds. **Disclaimer** Still a newbie to this world. I only use regulated mods for Science through Safety. When I use my RDA in my mech mod I throw a evolve Kick v2 in it. I only used 28g Kanthal for the first month and a half. I just purchased 22g Kanthal, specifics to follow: 7 wraps , dual coils positioned near the air intakes, .3ohms, in a Stillare RDA, on a Cloupor T5 at 50 watts, and Nicoticket's 6mg Custard's Last Stand 50pg/50vg juice and I am creating weather storms compared to using 28g Kanthal.