I need gym advice!!💪🏃‍♀️🏋️‍♀️

I recently joined my local gym and it’s going pretty well so far and I’m feeling a lot healthier. But I am only 14 and this means that at my gym I can use all of the cardio machines but none of the weights. It’s great that I have access to some machines but my main aim is to tone my abs and build up my bum and legs. All I see on social media is that weights do much more than cardio when it comes to toning eg....

So, like I said I don’t have access to weights at the gym and don’t want to spend lots on weights at home so does anyone have any suggestions of how I can achieve the results more like the right picture. Thanks!