My bra size has considerably changed these last years (smaller cup, underbust etc) so the bra I am currently wearing is a 32/34 J (I used to wear much larger).
so this is my first advice: get yourself to a professional bra fitting. It is so incredibly important. I never had luck at high street fittings or highstreet boutiques.
the smaller, niche boutiques specialised in large breast or reconstructive surgery patients are usually the best. I travel nearly 1 hour 45 (one way) to meet „mine“ and it is so worth it.
anyhow: makeup. A full face can be nice. But I‘d say that emphasising one feature is usually enough. Bold(ish) lip colour and mascara? And you’re done. And it takes less than 5 minutes.
or more dramatic eyemakeup and some tinted lip balm (but that takes longer).
If you wear glasses you can skip the mascara and just go for a bold lip imo. It’s one thing and makes such a difference.
similar with clothes: choose on thing to emphasise.
do you like your legs? Great. Opaque tight and short(ish) skirt or knitted dress.
nice waist? Maybe define it with high waisted trousers (or a skirt), a belt and a tucked in shirt. Super simply. All you need is a reasonably well fitting pair of trousers and a belt.
nice cleavage? Emphasise that.
hair: that depends so much on hairtype, face shape, preference. A blow dry brush is a life saver for me but won’t be for everyone.
people will pick up on hair, makeup and your outfit/clothes. But there’s no need to do all 3 of them. It’s usually enough to get a decent outfit and hair OR makeup.