Not necessarily better, just another approach that uses SU options which are often helpful…
The photos you’ve taken can be imported into SU. where the two pictures can be properly scaled, and then used as a visual reference,… accessed directly from within SU’s model space.
This sort of thing allows for comparisons to be made where you can trace over, or just place guide lines into position that extend out past the photos, and onto the SU outlines your modeling.
You’re 4 sections approach here is fine. another alternative to that, would be to draw out the side wall profile, and then use the follow me tool to extrude the cross section around the path of the octagonal jar shape.
This could offer some improvements in terms creating the subtle curves which are involved in the modeled jar.
With the right photo’s you could probably pull off the raised/recessed (embosed ?) design to integrate into the jar.
it would be a good amount of work, requiring a lot of patience,… but also a valuable learning exercise if you were up for that level of detailed modeling work.
This is why so many folks just model simple tea cups… you’re upping the game just a little bit with this jar here.