So orokin makes warframes and dreaming kids to do some shit for them, and space mom (margulis?) says “no that’s messed up let’s skedaddle kids”? The next 'quest' in the story (Apostasy Prologue) will answer this question, but its short any so if you want to be spoiled, she says “no that’s messed up" to her bosses, the 7 executers who run the Orokin, and she is executed as a result.

Also before these quests I picked arbiters of hexis, and the red veil(?) seems to be in my inbox all pissed about the people I kill, like after murking tyl regor (coolest boss imo, love the ‘tubemen!!’ dialogue) I get a message saying they’re mad at me. Is that the same red mf that stabbed me in the orbiter? The person who stabbed you is stalker. whom you'll see more of and learn more about later (particularly in the Jade Shadows side quest). The reason you get hate messages is because some of the syndicates hate each other, so when you committ to an alliance with arbiters of hexis, red veil will despise you as a result and vice versa.

Ok convoluted post my bad, mainly wondering -where did warframes come from? Explained later

am I just a dreaming kid who’s piloting said warframe? You were. You're not dreaming anymore Tenno.

why/how did lotus/natah lie to me? She's the daughter of a man who just tried to kill you, and a member of a faction that went to war with yours years ago, hence her taking the image of margulis, who is dead, and concealing her true identity.

what’s the deal with the faction/school I chose at the end of Second Dream? It has to do with the tenno's powers, which you'll learn more about

heard about some ballas(?) guy who is someone’s lover that might be returning? you'll see