Newbie considering voyage on a tall ship, requesting advice

Ahoy mateys. I happenstanced across the Stad Amsterdam in NYC the other month and learned that you can actually join a voyage. I've never sailed before, but I think it sounds like a fun and unique adventure and I've been thinking about signing up since learning about it. I know nothing about this world but have been doing a decent bit of research on ships, types of voyages, etc. Some questions on my mind are below, but really any sort of advice for newbies would be greatly appreciated.

1. Am I romanticizing sailing in my head? Is it enjoyable for laypeople with no experience or is it really geared more towards enthusiasts?
2. The Stad Amsterdam just released two new voyages for February: one from Portugal to Tenerife (9 days), then from Tenerife to Saint Martin (21 days). Would it be bold of me to do the 21 day voyage with no prior experience? Or would you suggest the 9 day voyage for a first timer? I'm using the Stad Amsterdam as an example, but general question is longer ocean-crossing vs. shorter voyages
3. There are lots of other ships out there with different options for voyages. Anything to consider when evaluating alternatives? I like the Stad Amsterdam a lot, maybe because that's the first one I saw, but I'm open to others.

For context, I'm 30M in good physical health, so I'm not particularly worried about physical demands and want to be put to work. I'm in search of adventure, personal growth, and unique experiences, and a tall ship voyage sounds like it could be a great fit for what I want. What am I not considering?