2nd Proffesion Question

Can i change my 2nd proffesion after the Training mode?

You mean after Pre-Searing? Yes, but it's much further on, about 1/2 to 2/3 of the way through the game.

Thanks, but where at?

You can't miss the location.
but if I told you, I'd think it would tell some of the story.

So I won't tell you

You'll have to make it to Droknar's Forge to get the quest (something like "Fallen Heroes" quest I think). Complete the 4 or 5 quest challenges in the Crystal Desert, then, you can change your 2nd profession as many times as you want ( I think Destiny's Gorge is one of the locations you can change them at in the Crystal Desert).

Bad thing is that you'll have to find the skills for the new 2nd profession, or purchase them (with 1 skill point and 1 platinum).

I changed my 2nd profession from Monk to Mesmer, and now Necro. I'm Ele primary. My 2nd was Mo until ether renewal and zealot's got nerfed all to hell.

A bit of a spoiler, but still you don't have to do Hero's Journey to get the Path quests. You just have to Ascend/beat your Doppelganger and you can just go to those desert towns and get the quests.

There's more to it, but there are enough threads floating around as is about changing secondaries.