That's a big jump, Ron - from 6MP to 24MP … 4x at one go!!! … My first DSLR was the Canon EOS Rebel T3. Then, I doubled my Res from 12MP to 24MP when I bought my first Nikon - the D3200. Then, I went a little backwards, as I had bought some Tokina lenses on sale, which would not AF with the D3200, so I looked around for something I could afford, and picked up a used D90 (bought with the Battery Grip) and then, had to send it back after a month. Its replacement was a Refurb D7000 with just 16MP. But, that camera has performed flawlessly. However, I did find it a little on the heavy side. I miss that D90, tho' - it has an excellent and very bright and large VF. Neither the D7000, nor the later D7100 I added - seem to be as capable in that department. Anyway - so, I, too - also use different Res sensors - a full half of my dozen use 24MP sensors. Two have 18MP, two have 16MP (+K-50) and the other lone wolf is a 20MP.
And, yes - you're right! They are all very capable cameras, whether they're described as Entry-Level, Advanced/Intermediate or ProSumer. There's not a real lemon in the bunch. The fun is learning all the different ins and outs, and other idiosyncracies, as I keep using them all, side-by-side. Each and every one of them, produces excellent images, at the right time, in the right place, with everything "kosher" ....

That's a big jump, Ron - from 6MP to 24MP … 4x at one go!!! … My first DSLR was the Canon EOS Rebel T3. Then, I doubled my Res from 12MP to 24MP when I bought my first Nikon - the D3200. Then, I went a little backwards, as I had bought some Tokina lenses on sale, which would not AF with the D3200, so I looked around for something I could afford, and picked up a used D90 (bought with the Battery Grip) and then, had to send it back after a month. Its replacement was a Refurb D7000 with just 16MP. But, that camera has performed flawlessly. However, I did find it a little on the heavy side. I miss that D90, tho' - it has an excellent and very bright and large VF. Neither the D7000, nor the later D7100 I added - seem to be as capable in that department. Anyway - so, I, too - also use different Res sensors - a full half of my dozen use 24MP sensors. Two have 18MP, two have 16MP (+K-50) and the other lone wolf is a 20MP.
And, yes - you're right! They are all very capable cameras, whether they're described as Entry-Level, Advanced/Intermediate or ProSumer. There's not a real lemon in the bunch. The fun is learning all the different ins and outs, and other idiosyncracies, as I keep using them all, side-by-side. Each and every one of them, produces excellent images, at the right time, in the right place, with everything "kosher" ....

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Being that I have had MANY MANY cameras in my years - (50+) And in the fact that my 5D Mark II just died from the years that I have used it - I would go "mirrorless". Less moving parts mechanically. And, too, there is always a problem with the electronic "stuff" to go wrong.
My old cameras (film) are still working after my 50+ years of use. Particularly this one (Ansco 1941) -- (Which, of course, IS a Mirrorless... :-)

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Nobody will agree with me, but my advice to someone who seriously wants to learn photography would be to find and old fully manual film camera. Of course studing to learn about how aperture, shutter, ISO, etc. work together is critical. A fully manual camera that is always with you, shooting B&W only for at least a year, and processing and printing it yourself would be really valuable. I think the value of the darkroom is to teach that getting the shot right in the camera saves a lot of time in the darkroom and just develops good habits.

I love technology and use it, but I'm grateful that the basics were all there were when I started. I'm afraid if I were doing it now I would jump into the high-tech stuff too.