In the morning I brush my teeth, havtake my supplements, then go to the Gym. In the morning I brush my teeth, take my supplements, then go to the Gym.

Very subtle nuance in the difference between "take" and "have", but for some reason "take" is used with medicine and nutricional things. I think "have" is more for things that are set in stone like meals ("let's have lunch."), available like items on a menu ("I'll have the fish"), and such.

In the morning I brush my teeth, havtake my supplements, then go to the Ggym. In the morning I brush my teeth, take my supplements, then go to the gym.

When I comeget back from gym to home I make some coffee then go to my desk to start to work. When I get back from gym I make some coffee then go to my desk to start to work.

"get back" is a verb that takes a "from", but never a "to" since the destination is assumed. "Come back" I think could be fine, but I feel like I'd only say that to someone who's at home, knowing when I'm coming back.

When I come back home from gym to home, I make some coffee then go to my desk to start to working. When I come back home from gym, I make some coffee then go to my desk to start working.

At 12pm I stop working to have a lunch. At 12pm I stop working to have lunch.

At 12pm I stop working to have aeat lunch. At 12pm I stop working to eat lunch.