Wedding invitation etiquette

Hello I already sent my invites and now I’m obsessing over whether I made a huge mistake that will upset people. I did my own handwritten calligraphy on each outer envelope no inner addressing. On Pinterest the name looked informal and the look of the line drawn off each side of enevelooe following the first and last letter I was drawn to follow. So my dilemma is unmarried guests with SOs I wrote ms. a smith. I did not induced SO names or and guest because on rsvp cards I put two lines to write the name starting with letter m. And I wrote this invitation has 2 seats reserved (found on Pinterest I liked how clear it was to not cause confusion). Did I mess up not writing in calligraphy and guest or the SO name on outer ?

Thanks