Dressmakers, Tailors, Dress designers - Looking for advice

[No Vested Interest]

I'll be Mother of the Groom in 5 weeks.
An appropriate dress is hard to locate - Size, color, style all involved.

I've finally located one I like - dress and jacket.
Problem is that it's full-length, would need to be shortened even I would be wearing it full-length, which I wouldn't, safety being one issue.
I realize the full-length is more elegant, but it's a fairly small wedding, and I doubt I could carry off the full-length, nor do I want to, with any aplomb.
I would want the dress to fall just below the knee. I'm 5'5", not slim.
The skirt portion, connected to the top, has several soft pleats; the fabric is a satiny polyester, according to the printed description, and a separate lining.

My question of those who know about these things is: can the skirt be shortened, while maintaining the style.
IOW, will it look peculiar to have a skirl designed to be full-length shortened to Knee-length?
I really like the dress the most of any I've seen, but don't want to look like a home-made hair cut.
(The shop will alter for a price; the dress itself is rather pricey, but I'm willing to pay for this one-time, special occasion.)

Thanks in advance for any advice you can offer.

Posted in Household hints and help; received note that Crafts group might be helpful.