You need to decide which of the main types of DE you want to be - meleer, trapper or hybrid.
Generally, if you go down the DW path, you don't need Blade Combat since it does nothing while you are DWing; most ppl only put 1 point into DW just to get the facility. Most weapons that require BC have sockets and you can easily get round the minimum BC requirement.
Don't worry about where you put your single attribute point. Later you will be picking up gear that has modifiers like +60 to Strength etc. Personally I tend to use Strength or Phys Regen for the extra hitpoints.
There are a few build guides in this section which should help, but bear in mind that some may have been written by people with less experience than you. Oh, and if you are playing SP you really should take Trading.