Gosh there are some very observant people on here re bra straps/humps under blazers etc!!
I think it's a perfectly nice* dress OP - not exactly striking, but it ticks your boxes re budget + ease of wear + colour that suits + covers your legs. Plus you can wear it again, dressed down for a lunch out or something. And with metallic footwear (my go-to to make something dressier) & accessories, maybe even bag (or clashing, depending on what you're wearing over it?), it will look pretty.
I too was going to ask if you'd tried it on yet - as it's not exactly the shape I would look at first for someone short & pear-shaped. So, if you order it & it doesn't suit ...
... you said you liked & suited green? Here are a couple of things I posted recently that I think are good if you're short, have a small waist & fuller hips. I actually really dislike about 95% of Karen Millen stuff - but thought this (in a linen-blend organdie of all things for KM), was a bit of a gem for someone who likes & suits this sort of shape. £135 but has an extra 20% off so just about on budget?!!!
It's not in petite but KM's fit is on the shorter side anyway, so hopefully the waist would sit at the right point on you. It's also - bizarrely - described as a maxi dress??!!! The model is 5' 9", & it's over-the-knee/barely midi on her at 125cm long, so would be a midaxi (horrid but useful word) on you.
The slightly see-through organdie makes it dressier than just any old shirtwaister & is lined too (polyester, but hey ...) so is perfect for spring. And hopefully would be wearable for you again, rather than it having to join the Vinted re-sale pile ...??!!
https://www.karenmillen.com/product/karen-millen-organdie-plunge-collared-woven-maxi-dress_bkk24517
*Sorry if that's damning with faint praise a bit!