hi, don't despair! I have built a couple of models, and, until your tool kit arrives, you can make do with very minimal tools, especially in the very early stages. Pretty much until you are done with planking, you will be fine.
You will need to get a craft knife, and some sand paper, you can stick some to a block of wood to make a sanding block. Good tweezers are a must, and some spikes for drilling holes. I used thin metal rods ground to a point at one end for that. Apart from that, a small pair of pliers,side cutters and a very small hammer are useful, but not essential. All this stuff can be gotten or made at really low cost, so you won't feel bad when your tools arrive. Other stuff you can make is a jig (finally got round to making mine today, the forums have some really good ideas) and a table clamp. These are definitely not part of the tool kit, so you may consider buying them if mony isn't too much of an issue. Once you get the tool kit, you can decide what else, if anything, you want to suppliment it with
Otherwise, one of your best tools is the internet, including this forum, for advice and additional reference photos.
Hope this helps, enjoy the build.
Part time modeller, full time biker
Built: Pinta
Belle Poule (plastic)
Endeavour
Scratch build of Pirate ship "Neptune" (Based on cutter "HMS Aldebaran"
Current builds: Victory