Good advice but consider also a Zenith kit
either the regular Kroma kit or the dinky coolfire kit with slightly narrower D22 Zenith tank
https://www.planetofthevapes.co.uk/.../innokin-coolfire-mini-zenith-d22-kit.175272/
Almost completely foolproof system on the Zenith
There are also other options for smokers trying to quit like pen types or pod systems
(I not used pods so can't comment personally, a Zenith Kroma kit is very good if you can run to it)
Kroma kit will set you back around £45 - bigger battery life
Coolfire D22 maybe about £35 on Amazon - dinky system
as said other options but just my two cents/tanks/kit
best of luck finding a kit that works to help you in giving up
PS - your other issue is deciding upon an e-juice to start vaping with
you may end up with a kinda tobacco flavor to emulate the fags
or a slightly sweet baccy flavour perhaps but likely a kinda baccy something at first
though you may move onto other types of juice too
it will likely be a 50/50 mix - don't worry too much about all this too much
most decent setups will handle most juices very well so the PG & VG ratio shouldn't be a massive deal
Nicotine levels - probably about 16mg give or take a bit depending how heavy you smoked
I would say do not go below 12mg nicotine at first/for a good while or you may find it doesn't hit your nic fix
I started on 16mg and dropped slowly to about 11mg
then after about 2 years just about dropped to 6mg in stages but I might need to go back up a bit
you being a smoker will likely not be able to drop below 12mg for a while
worst thing you can do is try too low nic and give up coz you are not feeling it so go back to fags
so you need to ween yourself off the higher nic a bit by bit
so yeah 16mg is a good place to start or deffo no lower than 12mg even if you was a casual Silk Cut smoker
Doubt if you need much more than 16mg unless you were chain smoking Old Holbun etc....
coz most vaping stuff now is much more effective & efficient than the stuff a few years ago
But take what I say with a pinch of salt as everybody's vaping journey is slightly different
it was only a rough guide based upon my own experiences - not gospel set in stone
ATB