Good luck if this is your first geocache. Hopefully it will be the first of many. If you have never looked for one before I want to give a small piece of advice about GPS accuracy. They are not perfect! When I hid a cache I take co-ordinates over a number of minutes and use the average. However even then if I use my own GPS to find the same cache it might say I'm 5m away. my advise if use the GPS to get you to the general area and then use your eyes. things such as trees or tall buildings can affect accuracy.
The first container is a short walk from the car park. You are looking for a medium sized Tupperware box covered in black gaffa tape to help conceal it.
On the logs (and most of the other in this series) you will find letters of the alphabet and number. For example Z=8, Y=3. Check all the logs for this kind of info as you will need it to find the bonus cache!