I have not wielded a soldering iron in a long long time (almost 20 years).
You might want to practice a few joints on a piece of strip-board with some scrap wire first. MintyBoost and MiniPOV are good starter projects too.
All of the clock kits are great. The Monochron is relatively easy. Both the BulbDial and the Ice Tube are a good challenge. If you take the tutorials step by step and check your work against the photos you should be fine. If you run into problems, there is always help here on the forums. :D