There are many large people that look beautiful. You have to search for the right clothes.
I assume from your comment that you're maybe a bit chubby; that's no shame. Many chubby people look wonderful in fem clothes.
You maybe should go for something more comfortable than the sexy secretary look, but (unless your suuuuper overweight) there will be something that's suiting your figure. Just google some guides for transfeminine clothing and try some stuff. Many of us wanna wear feminine clothing while having similar issues. A love for food is not depending on the gender ;)
Btw: My personal recommendation are long black skirts from the steampunk/goth/pseudo-victorian niches. They often have enough accessories and other highlights to distract; and they don't look all that bad if one is a bit larger