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You can obtain one of the VHDL books from this forum, and search for some tutorial online. Read through the tutorials to get familiar with syntax, practise coding and synthesizing in simulator.
But first of all, figure out what you wanna achieve through VHDL. If you only want to learn for fun, really easy to get bored of it.
Dr. Z. Navabi has a easy to undrestand book on VHDL which has many samples in each section. I don't remember the exact name of his book, but you can find it in amazon by searching author's name and VHDL as keyword.
Downloaded and installed mentro Graphics model sim from xilinx website ( its free and the one of the best HDL simulators around) .
then bought two books
The beginners guide to VHDL by P J Ashenden
The designers guide to VHDL by P J Ashenden
obviously started from the first book and in the process of learning VHDL the following examples helped me a lot to understand basic building blocks www.cs.ucr.edu/content/esd/labs/tutorial/
it takes time but this approach is ever lasting. my advise limit yourself to good stuff while learning HDL's
IMHO you should order a low cost start kit from Xilinx or Altera website and start out with it. They have all documents, instructions that help you to start up. I suggest you should start with a low cost CPLD start kit. It costs only $50.00 if you in North America.