A couple of times my car would not turn on?

No sometimes when it doesn’t start right away, I’ll turn the key, but only the dashboard lights and radio come on, but I hear no cranking from the engine, it’s completely silent. Yes, I think it might be the ignition, I thought maybe the battery, but all the lights are perfectly fine and are not dimmed at all. Also, I bought the car maybe three weeks ago and I have never seen the check engine light on, and the car runs good. Honestly I’m good if I have to turn the key a couple of times to get the car running like I said before it doesn’t happen all the time I’m just worried if it’s a more serious problem like I don't want my car to stall on the highway or something, but right now it’s seem like it’s something not to worry about I just want to talk to an expert to confirm that though.