Im man,19. from past few days in the morning im first eating breakfast then im brushing my teeth. i feel i dont have any energy to do first brushing. is it okay to do so, eating and then brushing? im having braces on my teeth too?

That's perfectly fine. You can then remove any breakfast remnants caught around your braces.

Buy a WATERPIK to force out any debris left on teeth and braces.

Brushing 2 full minutes by the clock 2x/day will remove about 65% of harmful bacteria from your teeth. Use a timer. The other 35%, the bacteria between your teeth that a toothbrush can't reach, requires floss or WaterPik (I favor the latter as you are wired). Do not go to bed without thoroughly cleaning your teeth or bacteria turn food debris into harmful acid. Ask Orthodontist for instructions.