A lot of the veterans here have chimed in with good advice. Keep safety first and foremost in your mind and I do not think you will have any issues starting off with a mechanical mod, especially given your occupation.
From a new guy's perspective, I was aware of e-cigarettes and this whole community but remained on the fence until only recently. It is good that you are doing research first before diving in. I took a different route and impulsively purchased a mechanical mod as my first setup having no knowledge of ohms, atomizers, coils, or anything really. It was a great deal on a rare, authentic mod and I could not help myself.
Reading tons here and watching lots of Youtube videos before building my first coils, I am about a week into it with things going quite smoothly *knock on wood*. I use the lock ring every time I am putting the mod down and monitor my batteries religiously. All in all it is not as complicated as it seems looking from the outside in. Just take your time.
Also, do a lot of shopping and take your time before choosing the mod itself. Quality is important but so are aesthetics.There are many many beautiful designs on the market now and you would be doing yourself a disservice by going with anything that you do not absolutely love the looks of. Keep in mind this is something you may use everyday so you might as well take some pride in it.