Need help buying first road bike

[GoDlyZor]

Hello,

I've recently become very interested in having a zwift or similar set up. I'm interested in buying a road bike that I can use with a smart trainer for at home workouts to improve my cardio. I would also be interested in the occasional ride outside.
I have not had a bike for the last 5+ years and before that had off the shelf cheap walmart ones. I looked at a few on sites like canadiantire.ca but figure that they may not be made to last. I'm 5'9 and a bit, 185 lbs. No clue what frame size would fit me best.
I found a few listings on my local kijiji. I was wondering which of these might be best for me and if none of them then what should I be on the
look out for?

Thanks!

Some options I found locally:
https://imgur.com/a/BgA8eb1
https://imgur.com/a/f5D3Jbr
https://imgur.com/a/29N6nX9
https://imgur.com/a/HnmVMzP

A bit more pricey but wonder if worth the extra money:
https://imgur.com/a/99p3p74
https://imgur.com/a/sCG4z3g