Do I see a small pilot hole?
It look like a small hole in each of the tails to avoid over cutting and make the job cleaner. Initially I thought a router with a template would keep a constant distance and a clean edge and then finish it with the jig saw. If you had a bandsaw, you could set the fence a stop then flip each piece over to get both ends.
I don't see using a table saw or circular saw for this operation. You could set the table saw blade over for the bevel angle and use a tall fence on the miter gauge, but that's a lot of trouble. A small diameter blade like a 7 1/4" thin kerf blade on the table saw would work for the long edges using the fence, BUT I wouldn't trust a novice to drop the pieces on a spinning blade. Rather raise the blade up from the bottom through the work... pretty risky for a novice.
No real easy answers as far as I can figure. :frown2:
A Japanese pull saw would give you precision for the bevels, but it won't help on the long edges.
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)