Want to grow marijuana, advice?

[soon2b]

I have been smoking so much lately that I decided I should probably just grow my own plants. I will be growing it for personal use for the most part. Does anyone here have experience with this? Is it hard to do? How long does it take to go from seed to ready-to-smoke weed? What are some good seeds I should look into? Is the whole process expensive? Is it worth it?