Very cool - you'll love it - any Elise is brilliant compared to 99% of the cars you're ever likely to own and drive (even if you are Mass, AndyG, Renmure, etc. who seem to like the more exotic cars as well as the Loti

) and the S2 111S is well up there amongst the Elise variants - plenty of time to look at the Exige later (I've got both, and can honestly say that in more spirited driving sessions, I prefer the S2 K-series Elise to the super charged S2 Exige).
And now the word of warning - even though it is the more friendly S2 Elise it will still swap ends on you at the drop of a hat if you reach the limits of traction and talent.
The S2 tends to understeer towards the limits, which is safer in principle, but understeer makes oversteer when you lift off the throttle in a panic ....
It's almost a cliche to suggest a carlimits.com day, but really the cost of the day might easily save you in terms of increased insurance premiums after you need a new clam having found the barrier on the exit of a diesel covered leafy wet roundabout - these are the usual excuses people give when they try and impress by burying the throttle on the exit of a roundabout - in their minds it will turn into a glorious smoking of rear wheels and a dukes-of-hazard drift; in reality it results in swapping ends into the barriers

. Also your enjoyment of the car will increase in proportion to your confidence in knowing your limits and the car's limits - when you know what you and it can do, you can stick within those limits and have a huge amount of fun.
A track day is also a valuable lesson - it will help you find the limits in a (relatively) safe environment. Most of the KH (knockhill) days that come up on this forum will be appropriate for novices; do some KH days before venturing further afield - KH is a good track to learn on.
There is no substitute for experience, so do as much driving as you can in it and build up speed and confidence slowly. Don't be scared of the car, but treat it with respect, especially when grip is reduced.
Cheers,
Robin