You have arrived at this forum, so you're clicking a bit too low on the hyperlinks. Start with Seam 2, getting started, documentation and download contains all the information you need to learn Seam. The Seam 3 and Weld stuff is
under constructionstuff and definitely not for starting with Seam.The most important part of Seam depends on the things your boss (or somebody else who pays your salary) has asked you to realise in an almost imposible timespan.
Welcome to the wonderful world of Seam and be patient.
Thanks Leo! I think I should start, right now