1/ post in subreddits like r/weddingplanning, r/OffbeatBride, r/Marriage, r/BridalBuzz. offer to write 3 free speeches for anyone who comments. people love personalized help and you'll get social proof, feedback, and word of mouth.
2/ since this is super niche and emotional, it has strong viral potential on tiktok. post videos like:
“i used ai to write my best man speech using our instagram dms”
“this best man speech was 100% ai… but it made everyone cry”