Ofcourse it is important, the camera, it is the tool you need to get the picture that you see already in your mind. But what about the quality? The picture above is taken with an iPhone 11. I know that is a good phone, but I had a picture taken with a Samsung S8, printed on a canvas of 100 x 80. First I had in photoshop the pixels doubled and then sharpened it. It looked great anyway.
So there is no need to blame your camera if you don't get a good picture. Mostly the camera does alright when it is on auto, but there are circumstances when it does not work so well. For instance in snow: your picture will turn out grey instead of white. But... that can always be fixed on the computer later on when you photograph in RAW.
I use a Nikon D7100 and D750. It also could have been Canons. But in the time, way back, that I chose, I found the Nikon sturdier than the Canon, that was more plastic. Later I DID buy a Canon for that reason: it was light and easy to bring with you. I disliked however to have to adapt to the other camera all the time and I did not want to buy two sets of lenses. So I stuck with Nikon because of my gear I bought sofar.
If I had to chose again, I would have gone with Canon. I like their service far better than that of Nikon, but that is personal. Someone else might have the opposite experience.
Also sharpness is not always important. It largely depends on what you photograph. I can imagine, that if you take pictures of buildings and other structures, that you want sharpness, even till the edges. But if you take portraits you like the eyes to be sharp, but some softness towards the corners is no problem. Nowadays people even hunt for vintage lenses, that have their own 'personality'. And most of these are not the sharpest :-) What is important is the image, even with a somewhat soft lens. No one is waiting for the technical perfect picture that does not speak to you. Most kit lenses that come with the camera you buy are doing well.
And if you want another one. Why not consider second hand? I bought some lenses and a camera second hand. You save a lot of money with that. It would be smart to buy in a store so you have your warranty.
So take what you have with you outside and use it.
Another thing that may help you find better pictures, is a piece of carton with a rectangular hole in it, matching the form of your sensor. When you look through that at the world, you see what you will catch on the camera. It helps you to learn to see what is important between all these colours and objects that surround you. You need to 'frame' it and isolate it from its surroundings. In former days we had those diaframes.... Maybe you can find one somewhere.