It's tough to recommend in such a fast-moving area, I would suggest the stuff I've been using and very happy with - but it's 9 months old now (and still going strong!) so other newer things may be better but I have no experience.
Smok Alien Kit - This is the "square block" (mod), but it comes with a small tank (RTA) that I haven't tried but is supposedly quite acceptable. It is a small tank but very easy to fill.
https://www.elementvape.com/smok-ali...kit?enter=true
I just picked random first result on Google, idk where in the world you are.
I use a Boreas RTA tank, which is great but requires manual fiddly building so prob not suitable for beginner (and besides, it's no longer available).
I believe Smok makes some very good bigger tanks, TFV8 etc. There is massive variety here. I also have a Griffin 22 (great!), Kayfun 5 (much tighter draw, I like airy these days - and it doesn't feed juice enough with the variety I use being quite viscous), a Velocity 2 mini (a dripper - no tank for juice needs "dripped" very regularly). I have a load of other tanks/ attys in the graveyard too
You can get batteries from this place also, I use the Samsung 25R at the moment. The Sony VTC are also very good. It takes a pair, and that pair should be "married" - that is, always use and charge together, so they degrade at the same rate. Mark them immediately with a permanent marker pen and keep them paired. I'm somewhat reluctant to suggest a dual battery mod to a beginner for this reason, it's something to be wary of. I would suggest buying at least 4 batteries so you can charge a pair while using the other pair. I have 6, marked A,A - B,B - C,C. Just bought another 6, since they original set isn't lasting so long now. But not using them yet.
I would recommend the XTAR VC4 charger.
https://www.amazon.com/Xtar-VC4-Char.../dp/B00U26ONVE
You'll also need some liquid, vast varieties available and it's up to you what you'll like and what strength is appropriate. A local store is an excellent option here.
In fact, a local shop is very much worth a visit if possible, but it'd be good to be well informed beforehand so they don't sell you junk.
I'm looking forward to buying a Pulse BF 75 when it comes out, and probably a Dead Rabbit BF RDA to go with it.
Wall of text sorry, and really just tip of the iceberg
Someone else will have completely different recs probably.