Commerce 1 or Commerce 2? I am not a developer although I have been using Drupal since it came out 19 years ago. 

I have an existing D7 Ubercart site that works well, but I want to move to Drupal Commerce.

I have installed Drupal 8 Commerce 1 at one site, and Drupal 8 Commerce 2 (commerce 8.x-2.16) at a second site.  

I know that Commerce 2 requires composer, but at the moment I have set up the Commerce 2 site with the above module (commerce 8.x-2.16) with Ludwig and it seems to function just fine.

Here is my question:

Would it be advisable to start my new site with Commerce 1 or Commerce 2? 

Commerce 1 is stable, and I am thinking that perhaps I should start there and eventually migrate to a stable version of Commerce 2.

Thank you for any insights or advice.
As @No Sssweat points out in a comment on your original post, there is no Commerce 1 for Drupal 8, so if you're upgrading your site to Drupal 8, Commerce 2 is your only option.

But even if that weren't the case, Commerce 2 is stable and it's where all the current improvements in Commerce are happening. While Commerce 1 may have a larger contrib ecosystem at present, I find that once developer energy has moved on to the latest version of Drupal, it's frustrating to try and solve contrib problems on the old version. So my advice is always to go with the more recent version, once contrib has progressed enough that they key functionality you need has been developed and is reasonably stable. I believe Commerce 2 is there.

Finally, the migration process is kind of a bear (especially if you're migrating historical order data), so personally I'd only want to do that once, D7 Ubercart directly to D8 Commerce 2, rather than the two step process of D7 UC -> D7 Commerce 1 -> D8 Commerce 2. I think you'd be creating a lot of extra work for yourself without much benefit.