I used to work in the industry
What's the budget and style wise do you still want a wedding style dress? You should definitely be able at this time of year to get something gorgeous for under £2k BUT allow costs for alterations by an experienced bridal seamstress, high street alterations places are high risk as they're generally not often working with these fabrics and cuts. I've dealt with many a distressed bride who's dress has been "stripped" (threads pulled, hems frayed, necklines lopsided) by an inexperienced seamstress, but a good bridal seamstress can work wonders including changing the shape of necklines, sleeves and gems, adding and removing sleeves and straps, altering fastenings eg from zip up to button and loop or lace up back and adding modesty panels etc
If so you couldn't be shopping at a better time. Just after Easter the bridal boutiques are usually having sales clear outs to make way for new season designs.
They don't only come in white/ivory either that stage has long passed you can get wedding dresses in all kinds of colours
You could also get a bridesmaids dress which will have a toned down style and they're available in a ton of colours.
Ex "display" stock will also be being sold at this time with huge discounts and I suspect with corona meaning many people have postponed weddings and planning weddings there will be great bargains to be had.
My usual tips are:
Try all styles on. Ball gown type dresses aren't a style we wear regularly now so we rarely know what suits us. But with your figure I would recommend you definitely look at mermaid/fishtail/trumpet styles (look WONDERFUL on hourglass figures), or full skirt styles with nipped in waists and at least a hint of sweetheart neckline, or wrap styles, corset bodices look good on this body type too. Generally speaking I'd say avoid column or sheath style dresses - but again try them anyway if only to confirm
Colours depends on your colouring of course but there are a range of Matt, satin and iridescent finishes available. I'd say iridescent works particularly well on hour glass figures.
As a general guide dependant on style, cut and bias they can be taken in up to 3 sizes but only let out by one. So consider a slightly too big dress if you find one if a suitable seamstress says they can take it in for you.
Wear for trying on as close as possible the type of underwear and heel height you'd likely wear on the day to get a true sense of the drape. Samples come very long as it's easier to take up of course this allows for gowns for taller brides. This is why boutiques have little platforms to stand on and try on so you can see how it drapes
Even if you don't end up buying from a boutique they are very useful for trying on a variety of colours and styles to see what suits in real life and also for measuring you accurately (thats a bit cheeky I know but it's true) the service you'd get from a boutique is the best really. You may have to make an appointment this is to ensure they can provide an excellent personalised service, plus so the shop isn't overwhelmed with visitors which can put the stock at risk - don't be put off by this.
From a quick google it seems they're dropping prices by 1/3 to 2/3! It's normally around 25-30% so you should definitely be ok price wise