Thank you! I don't know how I would do that with the sound but I did try to move a bit away from the mic when recording it so it would sound like it's in an actuall room to get kinda the same feel. :)
I believe the Reverb option in Audacity(free sound editor program) simulates a room quite well: https://manual.audacityteam.org/man/reverb.html. Lovely singing voice btw!