Hi Vasilios and welcome. Im another one of the guys who is new to wood working and Im glad I found this site. The folks here are very helpful with constructive advice and tips to help others out so dont be shy about asking questions.
Another great place to learn is of course YouTube. Theres alot of wood working shows that post on there. The Wood Whisperer, while being a bit commercial, is a good place for newbs to learn a bunch of the basic everyday skills and terminology.
If your any thing like me you will be googling quite a bit just to figure out what some of the terms mean. Any way Good Luck with your bench and I hope you will share some pics of your work as you build it.
Everything i build comes with a redneck warranty. If it breaks you get to keep both pieces.