How To Acquire Mods' Cards And Skills?

[N-14]

During the Tutorial. All Tennos were given by our respective Lotus with our Primary Skills which in time vanishes upon the Start of the Game. I was wondering on how to acquire them? Does this do with the MODS Cards? And how do I activate my Warframe Skills?

Help is much appreciated

[Dr-Jelly]

Mod cards gives you access to skills. Mod cards can be gained through killing enemies.

[Testiculitis]

Don't you also get them automatically when you create/purchause/choose your first warframe? You just have to put them into their mods slots once you get enough mod capacity.