Lemon rice is very good for nausea, beta. The tangy taste helps when you don't feel like eating anything. Just ensure you use fresh lemon juice and don't make it too oily or spicy.
It is absolutely fine to eat. Lemon gives good vitamin C and rice is easy to digest. Just don't overeat it at night if you are prone to bloating or gas.
Lemon rice is so comforting, but since white rice can cause sugar spikes, I used to make it with brown rice or foxtail millet. Just keep an eye on the portion size if you are monitoring your blood glucose levels.
Haan na, that sour taste feels so good when you have acidity or nausea! I used to eat it a lot with fresh curd. Bas try karna ki bahar ka na khao, ghar pe banake fresh khao.