My thoughts
I agree with the others that two weeks is hardly enough time to become proficient in any counting system. Since you have basic strategy down, I have a few suggestions:
1) During your first few visits, just observe. Watch how the game is played out. Note the ploppy and dealer commentary, then get used to ignoring it since it's usually complete nonsense. Take note of all the other distractions which are likely to come into play in a casino environment. Observe the pit, and how they react to someone betting and/or winning big. This will give you a sense of what is common procedures and what is genuine heat
2) While observing, backcount some shoes, to see if you're able to keep up with the pace of the game. By backcounting, you'll be able to concentrate on maintaining the count without having to worry about making basic strategy decisions. If you end up with a sufficiently high count, go ahead and wong in for a small bet. By keeping your bets small, you won't win or lose much, but you will gain some experience in a casino environment.
3) Acquire and play as many coupons as you can find. Since you're learning and this is your first trip, you're playing with little to no +EV. Coupons are a great way to give yourself a little more EV while learning the game. Others on this board might be able to suggest some sources for finding coupons.
Longer term, both KO and Hi-Lo will win if you play them proficiently. If you're comfortable with estimating decks in the discard rack and doing simple division, I'd recommend Hi-Lo. If you don't want the extra math, then KO might be a better system for you since a true count conversion is not necessary. Both these systems are fairly simple which makes them good systems for both beginners and experts. Although more advanced counting systems exist, many pros stick with simple systems since any additional advantage obtained from an advanced system can easily be lost by making more playing errors.
