I see quite a few posts here which were written not to help you but to show that poster do know a bit about vaping. Ignore them. There are different types of mods.
1. Mech mods vs regulated mods. Mech mods are most dangerous for beginners, stay away of them. I believe all in-face explosions happened with mech mods.
2. Regulated mods can be, well, unregulated and regulated. Regualted let you change input voltage and adjust vaping intensity to your liking. I would recomment them. All of these mods should have built-in safety features.
3. Mods with build-in battery and with replaceable battery. Built-in battery is easier to use, but in terms of safety they may be a little bit (just a little bit) less safe. Mods with replaceable battery require you to buy spare batteries and charger.
4. Small mods, bigger mods, big mods.
5. Cylindrical mods and box mods.
6. Mods with temperature control and without one (would not recommend temperature control for you now, it's new and safety record is very short).
It's up to you to choose what kind of mod you like and ask a bit more definite question, for example "which small regulated box mod is safe enough for me?" A bit confusing, but...
Disclaimer: I have not used most of the types of mods, only heard about them.