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Jeah I recognized the Road to Greatness Quests, but i don´t know if i fully understood them - so if I do them, I am not allowed to participate in other quests (for how long/ the next large version update?)
Road to greatness are your first quests normally, and you cant do other quests this version, or any road to greatness quests for the following versions.
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also I don´t know where to find a list of what 1 exchange point can get me for example or how the whole system around them works.

that's somewhere on this site, but no idea where, sorry.
So basically the idea is that you can swap exchange points either for more information about the game, or if you wanna trade more you can actively add something new to the game.
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Where can I find quests?
http://hero-empire.com/forum/13