Physical Fitness Exercise Programs

I joined a gym a few weeks ago and i’ve been going every single day. I’m looking to lose fat not gain muscle. I’ve lost about 10 pounds in like 2 weeks and i’m very happy with the results. But everyday when I go in there I usually run on the treadmill for about 10-15 minutes then do the elliptical for about 30 mins. And i incorporate ab workouts and muscle workouts too so i can tone my muscles.
So what i want to know is, is what i’m doing good enough to keep losing weight or should i have an actual program thing that i should follow? When ever i watch fitness videos on youtube, they are all about exercise programs and i think to myself, i dont have a program am i doing it wrong….
ANY HELP??

just do lots of cardio in the gym would be the best.