I remember seeing a camera a long time ago in a store. It was a Canon camera. That camera made me want to get a camera. I had been using cheap one time use film cameras and cheap point and shoot cameras when I could borrow them. I never got the camera and started just using cell phone cameras. Last winter, I decided to try to get a camera, but instead of just jumping in and buying that Canon camera, I decided to look into cameras. It really came down to either Canon, Nikon, or Sony. After looking at many comparisons between different cameras many of which had pictures, I found that I preferred the pictures from Nikon and Sony over Canon.
What really got me to go with Sony is that when I was getting a camera was that Sony had third generation mirrorless cameras out while Nikon was on their first generation. Sony seemed to offer more in instances like while Nikon offered a battery pack, Sony offered a vertical grip that has a battery or two in it. The vertical grip seemed more useful to me than just a battery pack.
The camera that I got was the Sony a7 III. If I could have afforded it, I would have gone up to either the a7r III or a7r IV. With that said, I like the a7 III.
My preference is more towards the r line of cameras from Sony rather than the s line because while the s line of cameras does well in low light, it doesn't give you the same sort of quality of image in a sense as the r line. The a7 III is sort of in between the two in that it does better than the a7r III and a7r IV in low light and gives you higher quality pictures than the s line of cameras.
The a7 III is cheaper than the a7r III and IV. It is also cheaper than the a7s III that is going to come out soon.
If you got a Sony camera that does not have a full frame sensor, it will cost less and the lenses for it will cost less. I am not sure about other companies, but I think that may be similar across companies. With Sony, if you get a E mount camera, instead of one of the others, you can use any of the lenses made for E mount regardless of it you got a full frame camera or crop sensor, but if you use a crop sensor lens on full frame or the other way around, it changes the zoom. Regardless, if you can afford to, look at the G and G master lenses. The G master is supposed to have all the newest stuff from Sony and the G lenses will be better than the lenses that are not G lenses.