dress muslin fabric DIY/ Dress/It only takes about 20 minutes to sew at home (for beginners) and breathable fabric muslin | Fashion History Timeline

Much of this comes down to confidence and with your suggested fit, it sounds like youre very confident in your sense of style

Amsale Nocturnal flowers bloom across this seasons gowns, calling to mind those once-in-a-lifetime moments of a wedding, while tailored pieces allow the brides look to evolve throughout the night, like a moonflower opening its petals. Amsale Spring 2023 Collection 7

I would be a S or M based on the size chart and I havent worn a mens small or M in 30 years

For summer weddings, pastel colours like soft pinks and buttery yellows are particularly fitting as they reflect the warmth and optimism of the season