Ok so I married Lydia and soon after I saw it was a mistake so I divorced her using console commands (Option 1 on the the wiki) I have reset the marriage mission so I now have bought the amulet of mara for a second time off of Maramel (And have gone over and installed the mod A simple Marriage mod and done these steps
1. console command resetquest relationshipmarriage to reset the marriage quest
2. console command setstage relationshipmarriage 10 to set the marriage quest to the stage where you can buy the amulet of Mara
3. kill your spouse, you can resurrect he/she later but remember to take all the useful items before resurrecting
To remarry:
1. wear the amulet of Mara
2. open console and left click the NPC you want to marry, or use command prid
3. console command setrelationshiprank player 1
4. console command addfac 19809 1 5. console command addfac 5c84d 1 (NPC face expression?)
6. speak to him/her and there should be an option to marry, if the option doesn't appear, fast travel and come back
But when I talk to Ysolda no option appears to get married.
I also killed her and resurrect her and she appears to be permanently crouching.