Hello there! Lucidity is when you realize you are dreaming, while you are in said dream. You can have zero control over the dream and still be lucid. Also, you can have god-like dream control, but not be lucid. The level of control you have doesn't factor into whether you are lucid or not. The only requirement to being lucid is knowing you are dreaming while you are in the dream. That is it. Like I'm sure you read, you can do pretty much anything during a lucid dream, using dream control. Dreams vary widely and some of the more vivid lucid dreams can be mind blowing-ly realistic.

Its very good that you are keeping a dream journal, so bravo there! This can help you build up your dream recall. I strongly suggest you keep doing this. Reality checks are brief activities that can help you realize you are dreaming. My favorite RC is the "nose pinch RC." You pinch off the air passage to your nose (aka, hold your nose), but attempt to breathe through your nose anyway. Obviously, you aren't going to be able to do this in waking life. If you are in a dream, however, you aren't actually pinching your real nose. You are just pinching our dream-self's nose, so you will still be able to breathe through your nose even though its completely closed off. Another popular RC is taking your finger on one hand and pushing it through your palm on the other hand. Again, in waking life, your finger isn't going to go through your palm. In a dream, however, your dream body is not the same and pushing your finger completely through your palm is easily done. The idea behind RCing is, you want to perform these regularly during waking life, so they carry over into the dream state. Also, when you are performing RCs, make sure to look around at your environment and ask yourself, "Could I be dreaming right now? Could this all just be a dream?" Then perform your RC. Even if you know, 100% in your mind, that you are awake, ask yourself these questions anyway.

I suggest you start by dream journaling as much as you possibly can and read up on some DILD tutorials. This will be the method you want to start out with. If you have any further questions, don't hesitate to ask!