If your top is bigger than your lower body, then perhaps you should wear a top that’s a little darker, even though it’s Spring. This, I feel, needs to be fairly plain, and you could add a really beautiful (short) necklace to take the attention off your breasts. I think a trouser suit would be a mistake - you need to draw attention to your lower body, so I think you need to get a striking pair of very well cut trousers, perhaps in an eye-catching pattern or colour. I would go for a pattern, personally. Team those with a darker top that compliments the trousers but doesn’t detract from them.
A classic bag in either of the colours of the clothes would look lovely.
The main thing is to feel comfortable and happy in your outfit. Don’t buy anything unless you love it. If all else fails, you could have something made.
Incidentally, some larger department stores have ‘personal shoppers’ who will guide you to suitable clothes that will suit you. I have used these and they are excellent, but they are rather hard to find now. I don’t know where you live but London and other large cities will probably have stores that have them. You will need to book in advance, not just turn up.
I hope everything goes well and that you have a lovely time.