I’m probably the last person who should be giving wardrobe advice but this is important:
Never trust the dressing room mirrors when trying on v-necked tops. They will lie to you. If you really want to know how your new v-necked top fits wear it to work. On a day when you have lots of meetings. Sometime around noon you will realize that the top is cut way too low and needed to be worn with a camisole underneath. I’ve tried this at least five times now. It works.