DV cards can be bought from around £20 or £30 up including some basic software.
I use Adobe Premiere and agree that it is far from easy to learn, but if you are in no rush to get your blockbusters released then it would be well worth learning. The Adobe Classroom in a Book tutorials are fairly cheap and easy to follow and will get you up and running fairly quickly.
You say you have around 4Gb of spare disk space.
YOU NEED TO GET ANOTHER HARD DISK!
The reason is that DV footage takes approx. 1Gb for every 4 minutes. That only gives you 16 minutes of footage, and that leaves no space to edit the footage. An 80Gb drive should cost around £80 on the internet.
Mark.