A plane is sure easier to fly. The helicopter can be flown almost anywhere, does not take much room, but is harder to control.
The toy grade helis are simple to fly, but you'll be bored quickly.
Same with flimsy little planes.
If you look around, you'll find a good deal on a used trainer. I still have a complete Hobbico Superstar, you can find those for less then $ 200 with everything you need to get started. I'd sell it to you for less, but the shipping is very expensive.
I have helicopters - an Helimax indoor, 30 Raptor and a Radikal Gasser - they are all very different and I would highly recommend a simulator before you fly the model. They are lots of fun but need your full attention. One time I had a bunch of mosquitoes sitting on me, one right on the eye and I could not let go of the sticks...got to set priorities.
Also I have a bunch of planes from 1/2 A to a 27% Extra and they are lots of fun, too. I could not really decide what I like better, so I have a little of everything.
Your local club would be the place to go. They can set you up with a buddy cord and you can see if you like it. Even if your space is limited, a 40 size trainer does not take up that much room. There is always some corner where you can put it in. The start box would be more of a problem.
Maybe an electric plane would be a better way to go for you. The term 'bigger flies better' is true for the most part.
Welcome to a great and fun hobby. Just a warning - once you get hooked, you want more. And you will always be thinking - I need just one more plane....