I've heard that completing the civil war will make some quests unavailable and even some homes unavailabe for purchase so i was wondering if someone could let me know which one's are affected and if choosing a side affects different quests.
I'm playing on xbox and joined the stormcloaks btw.
Also i'd like to have mjoll around so should i marry her and put her away somewhere safe or is she safe in riften?

Thanks for the help and sorry if this has been asked

Do Blood on the ice before the civil war. There's a whole bunch of quests if you do it after the war.

I did blood on ice after the civil war. AFAIK, the only thing the civil war quest will change is you are committed to one side in the war.