Hi Mashad,
So sorry to hear your nautilus mini breaks. For a starter I'd say you stick with that tank (until you find where your own preferences), Nautilus mini is a good simple no-hassle tank, it's been my favorite for a while. You can buy replacement glass for $2 (2-pack, translucent) here :
https://www.fasttech.com/products/0/10009224/1817202-replacement-glass-tank-for-mini-nautilus-atomizer
Just for your info, those glass tanks also available in few different colors.
Since you broke the tank, perhaps you could also consider tanks that more durable (glass with stainless sleeve to protect) like
- RGM2
https://www.fasttech.com/products/0/10006714/1535302-rgm2-bottom-coil-clearomizer-2-0ml
- Smoktech Aro Pyrex
https://www.fasttech.com/products/0/10007487/1632808-authentic-smoktech-pyrex-aro-clearomizer-2-5ml
Note that I only suggest you to try the glass tank as it's safer/won't crack with certain liquids (mostly that contain triacetin)
As for the battery (ego/evod) for now it doesn't matter as long as you happy to use it, keep it for the time being.
You have the privilege to start a wonderful journey of vaping, might as well start slow and enjoy what's best for you. I (and everyone else here) could only give you directions and options available, so you can choose and start your journey.
[If the following below is too details you can skip it, I only post it for reference]
There are lots of options if you want to go details here :
Tanks (some categories could be overlapping) :
- Clearomizers (clear or partial clear tank, whether it's glass or polycarbonate/pmma/plexiglass)
- Cartomizers (mostly clear tank too, but specifically use carto coil)
- Rebuildable Atomizers (Kayfun, Taifun, Ithaka, Fogger, RSST, etc.)
- Dripper (Magma, Origen, Igo series, etc.)
Battery-body :
- Regulated / Advanced Personal Vaporizer : Innokin SVD, Sigelei, Hana DNA series, Eleaf iStick, etc. (most of them are box or tube style)
- Mechanical : Nemesis, Stingray, Astro (no electrical parts), need separate battery and charger
- Ego/evod : different battery capacity (900mah, 1100mah, 1300mah) sometimes with voltage selector and/or USB passthrough charging
Battery type (popular) :
- 14mm diameter series : 14500, 14650
- 18mm diameter series : 18350, 18500, 18650
- 26mm diameter series : 26650
Coils Type :
- Rebuildable (single, dual, triple, quad, vertical, horizontal, diagonal, etc.)
- Stock coil (kangertech, smoktech, aspire, etc.)
Wick Type :
- Cotton (facial, japanese, ramie, etc.)
- Silica (braided, twisted, etc.)
- Mesh (400, 800, etc.)
All of these combinations could make a different experience (especially coils, wick and liquid type).