@yeswin I like that you recognize that taking on too much will overwhelm you and basically be a zero sum game. I feel that overlooking that is most people's mistake. With that being said, I would make the small first step of setting daily water and protein intake goals.
Protein = .8g per lb. of body weight (128 grams a day for you).
Water = bodyweight/2 in ounces (80 oz for you).
People will argue about the ideal amount of protein or whether or not water is important, don't let that make you hesitate or not do either of those. Get your protein and water daily goals taken care of and you'll see results. Which will hopefully encourage you to make other changes.
Also you mentioned your sleep but you didn't stress it too much so I'm kind of working on the assumption that it's not a really significant issue (yet). When it's an issue your words about it will surely be more significant. Sleep can be one of the hardest things to get right if it's not going well. Also, get some cardio. Your heart is the most important muscle to keep healthy.