How to start a healthy eating lifestyle?

I am by no means a nutritionist or a dietician or anything of the sort. I am just a regular human being.

Recently, I have been thinking about how to get healthy. Like anyone else, I thought I’d start a habit of exercising, and I managed to get myself to like it. However, I feel as though I can do better to improve my health. That’s when I decided that I should also work on my diet.

My main goal is to reduce cholesterol levels, blood pressure, sugar levels, unhealthy fat. There are others but I figured I’d start with these first.

As someone who doesn’t understand the nutrition table printed on food products, and someone who is in a bit of a financial constraint, I am asking for advice on what foods I should be consuming to reach my goals.

I apologise if my question does not make any sense as I am new to this.

How to start a healthy eating lifestyle?