Needing advice for : Gaining muscle and being healthy

I’ll just go straight into it.

I want to start being healthy again, I want to lose fat and gain muscle.

As of today, I weigh 143 lbs and I’m only 15 who has a height of 5’6 with a medium body frame. I’m a little insecure about my body and even my weight. I was told that being 143 pounds at my age wasn’t unhealthy and was totally fine. And when I walk out of the door, you can’t really tell how much exactly fat I have on me. But whenever I look at myself in the mirror right as I’m getting dressed, I just see all this fat. Some people may even call what I have to be “Skinny fat”.

When I was younger I had a lot of fat to the point where I was overweight but not obese, I even got teased here and there but it was whatever at the time. After all, I was just a kid. However over the years, I began losing weight, but it wasn’t in the healthiest way. I didn’t eat much at all and sometimes it got worse when I just wouldn’t eat at all because I felt so tired. And the weird part of it all, I never noticed my weight change until a few years of this constant routine.

I want to get rid of all this fat I have on my arm that jiggles and sags. I want to try to do something about my belly fat and legs. Building muscle is my main priority.

I understand well that nobody is perfect. That we should learn to love our body for what it is and that my body won’t look like this forever since I’m still growing... But I wanna get fit and get the ability to do more than 10 push ups again.

I’m trying to make sure I have at least three meals each day however often I have 2. Sometimes I even have one and even sometimes I don’t eat anything at all. My diet mainly consists of wheat and dairy. I don’t eat many vegetables, meat or fruit. I find myself just often eating rice. That’s what I basically eat every day.

I want to change but I have no idea how to start or what to do. I’d appreciate any advice or tips you have for me to start my new journey.

Thank you for taking the time to read this.