Salam brother.
There are bound to be times when fasting, especially at first, when you will feel low in energy. Just see how it goes, it does get easier as the days go by, your body adjusts. I hope it goes well for you.
I found this at a
bio of Hakim Olajuwon:
"Olajuwon believes that his religious faith supported his drive to a great career. During an NBA season he observes Islam's Ramadan, which includes periods of fasting. He would awaken before dawn to eat precisely seven dates -- the traditional Muslim fast-breaking food -- and to drink a gallon of water. He would follow with a prayer for strength and have no food or liquid until sunset.
When he played an afternoon game, he would pant for water -- but did not drink a drop. Still, he would say, “I find myself full of energy, explosive. And when I break the fast at sunset, the taste of water is so precious.”