If you are of the MTL persuasion, you could get either a one or two battery box mod, depending. Two can be nice to have if you think you may want to experiment with big clouds and low resistances in the future. It's harder to tote around though. Although having some two battery boxes tends to mean more battery life.
If you go one battery I'd suggest either a Jac Vapor Sandstorm (they come in 23 ore 25 diameter options which can be handy if you think you will like a larger tank at some point. If you have any interest in temp control in the future well, they're a very well liked DNA option. Then there is the Geekvape ages, which I think also looks nice, but it's shockproof waterproof drop proof and overall just insanely reliable. If your work contains active and etc situations they can be useful The Legend is the two battery option for that (both by Geekvape) and well, the Legend is ginormous but has good ergonomics I don't take mine out of the house that much (and I have purse) but well, it's pretty great, honestly. I think Teslacigs makes a pretty great board for a non dna mod, they are reliable and offer a strange and varied sort of set of design options but I really like their board .I also like Innoken mods (the Proton is a two battery favorite) and Innoken stuff is pretty durable indeed and easy on the eyes (in my opinion) anyway. The innoken Kroma kit is a nice setup with one of the best MTL tanks this year (again my opinion) and it's single battery. The tank is innovative, topfill, coils last forever 4 ml and great flavor and a variety of coil options. Again (in my opinion) it's one of the best MTL drop in tanks this year. Lots of folks feel similarly.
If you want a tube mod that takes a battery, the Ephro 101 is getting good reviews at the moment and it's very versatile, etc. If I did not have all the tube mods in the world already, I would probably get one.
I also like some (Smoant) mods, and I like Eleaf if you kinda want to split the difference between 1 and 2 batteries, well it's one of the smallest and lightest mods around that is two battery. I like mine.
Well, um though really? These are all personal opinions and you should get others opinions and also look at stuff on line and maybe like, check out some different vendor areas and reviews and stuff, I mean there's no rush, I mean not completely, you have some time to decide.
Welcome and good luck,
Anna