What is actually being asked here?
The feeling is familiar: a little behind, a little guilty, not sure where to start. The useful move is trading that pile of feelings for a picture. One way to begin is with two plain questions: what actually comes in each month, and what is each balance actually costing?
The concept that matters at the start is the gap between gross income, the headline salary, and net income, the take-home that actually hits the account. A monthly plan runs on the take-home number, not the figure on the offer letter.