Range Rover Sport feels harder to steer at low speed, is it normal?

Something small has been bothering me for about a week and I would like to hear from other owners. I drive a 2016 Range Rover Sport, and when I turn the wheel slowly in the parking, like when I park at the mall, the steering feels heavier than usual. On the road it feels normal, so I am not sure if I am imagining it. Sometimes I also hear a soft groan from the front when the wheel is turned all the way to one side. My wife says I worry too much because the car is still driving fine. My brother says it could be low power steering fluid, and my neighbour says it could be a worn part in the suspension. I do not know who is right, so I looked online for a while, and I read a bit about a Range Rover inspection service in Musaffah, but it was more about buying used cars than about steering problems, so it did not really answer me. First, is a heavy steering feel at low speed a sign of something serious, or can it be small, like fluid or tyre pressure? I checked the tyres and they look fine, but I am not an expert. Second, is it safe to keep driving for a few days until I find time for the garage? I use the car to take my kids to school, so I do not want any surprise on the road. Third, does the groaning sound mean something is dry or worn, and how do I explain it to a mechanic without sounding silly? Another worry is the cost. These cars scare me when it comes to bills, so I wonder if steering problems are usually cheap or expensive. Also, is there a simple check I can do at home, like looking at a fluid cap under the bonnet, or should I leave everything to a workshop? One more thing, the steering warning light has not come on, so does that mean the problem is small? If you had the same feeling in your Range Rover, what was the cause, and how long did the repair take? Thanks for reading, I will check the replies tonight.