I seriously need help Altima Nissan 2014 ! All I did was change spark plugs

Okay so please help me all I did was change the spark plugs on my gfs Altima 2014 SL 4 cylinder. I go to start it says I-key initially I solve that. The next time I try to start it it powers everything on but no engine turn over and I can’t turn off the car. Had to disconnect the battery to turn it off. I checked the charge on the battery it was low but now I charged it and it is good but same issue everything powers up and you can’t turn it off even the emergency shutdown. She needs her car back for work tomorrow and I am unsure how to resolve this. I seriously only changed the spark plugs hit nothing else disconnect nothing else. I had similar issue when I changed the battery but this is different the battery issue resolved once I did the procedure. And I did not have this issue where the car button won’t turn the car of. Please someone help me