Welcome!!!
You might look at 101Vape. They have the iTaste VV3 for < $30. It's a light-weight, variable voltage/variable wattage mod. I use EVOD tanks for which you can replace the coils when they burn out or start to taste funny. Mt. Baker has great prices on juice, and with a $15 order, they send you a free bottle of juice. Juice will probably be the most difficult selection. What kinds of flavors do you like? (I smoked menthols, but I typically don't pick tobacco/menthol tobacco flavored juices. I like dessert and fruit flavors.) How much where you smoking previously? You need to think about the nicotine level in the juices. Then, there's the ratio of PV (propylene glycol) and VG (vegetable glycerin). PV is a thinner liquid which is the flavor and nicotine carrier (just like what gets atomized in an inhaler). It also contributes to the "throat hit" (which I personally don't care for.) The VG component helps facilitate the depth of the vapor. If you start with a 50/50 mix, you can tweak from there. I'm usually 50/50 or 60pg/40vg. I don't need to blow cumulonimbus-sized clouds, but I like some depth because it's fun for me.
Back to the device - based on the coil inside the tank (various resistance ratings, measured in Ohms), the combination of the resistance and the voltage output that you set for the device, you derive how "warm" the vape can be. I like the VV/VW so I can set the variable WATTAGE to a nominal level. Then, I don't have to worry so much about what resistance I have in my coil - the device adjusts automatically for me. I like 2.2ohms on my coils, but I have a few 2.5 and 1.8 coils. That's why I throw the iTazte VV3 as a device choice. The VV3 uses eGo or 510 threaded attachments (tanks or pre-filled cartridges) which are quite popular sizes from all I've come across so far. The other reason I like the VV3 is that it's a pass-through, which means you can charge it while you're using it (USB cable with a micro-USB connector on one end.
I have the VV3, as well as a Vision Spinner 1300 (same philosophy as the eGo Twist, I believe) and an iTazte MVP2. The MVP2 is heavier, and bulkier, but it has about 2-3 times the battery life as the VV3 or the Spinner.
If you have a vape shop near you, see if they have a "tasting bar" That will give you an idea of some of the flavor combinations. Taste is all a personal preference - what one person loves, another will abhor. Same with nicotine level and PG/VG ratio. Try smaller bottles, if you can, until you start dialing in on what you like. And, if it's fresh-made, it might taste like a filthy ashtray today, but in a few days or so, it becomes your favorite flavor (and vice versa)
Part of my journey has been to quit smoking real cigarettes. Now, this has become a minor hobby (flavor chasing). There's SOOOOOOO much out here. Just find what makes YOU happy and allows you to achieve YOUR goal.
There are TONS of threads and videos on ECF with lots of great advice.