Low energy working out

Good morning friends I started working out in December doing cardio 4 times per week for 8 miles. Now for the past 3 weeks I’ve done 1 hr weight lifting and 10 min high incline walking with 30 min of cardio after 5 days a week with a rest day on Saturday and Sunday. I should say I am currently a 6 foot tall at 267 lbs. I just finished my third week but be been experiencing low energy. I eat around 2300 calories per day as I’m trying to lose about 2 lbs per week. The one thing I think it might be is that I’m not drinking enough water throughout the day. Any advice on whether or not I’m not eating enough or whatever would be helpful. I also average at around 200 grams of protein per day.