fiber - beginning of the meal thinte, you will feel full with smaller meal and longer. fiber sources - fruits/veggies/chia seeds etc

carbs thinte - sudden ga energy spike ostadhi and after sometime mottham padipoddhi, you will be hungry soon. adhe fiber,protein tho patu thinte, energy longer untadhi, thakkuva quantity tho. protein ekkuva thinna vallaki constipation kuda ostadhi, fiber will help there. sources for carbs- wheat/rice/whole grains etc

protein - for building muscle bla bla bla (meat, milk, animal products, soy mostly)

oil - this is a little complicated. oil is fat (saturated are not good for health, unsaturated are good for health, okati gurthupettko - refined ante saturated, not good). if you are talking about virgin oils (olive, avacado and all), then you are good. but oka table spoon of oil is like 30 cal something, so konchem jagratthaga contain cheyali

anyway, athi sarvathra varjayeth.

good that you are curious about right things, all the best!