So you want to go out and get your first DSLR, but you can't decide what camera to get. Well I think I can help you out with your decision. I'm a Nikon shooter so my recommendations will be all Nikon, but these cameras have canon counterparts as well.
If you're getting your first camera for casual shooting and don't really care about learning your settings, but may, one day, decide to get more serious about photography I recommend a Nikon D3300 or a Nikon D3400. These cameras are relatively low priced but are packed with features and have the potential to take professional looking photos.
Both of these camera are equipped with the same sensor with only minor upgrades to the D3400 from the D3300. These are crop sensor cameras with a 1.5x crop. Both shoot video at 1080p. Both can shoot at 5 frames a second. The D3300 has an ISO range of 100-12800 which is expandable to 25600. The D3400 has an ISO range of 100-25600.
I got my D3400 with an 18-55mm lens, a 70-300mm lens, a camera bag, and a 32GB SD card for only $499. That's an amazing price for this tiny beast. I took some of my favorite pictures with this camera and I highly recommend it to anyone who wants to dip their toes and test the waters or just do casual photography. Its a great camera to carry with you on vacation or to take family photos.
So what if you want to get started with photography, but you know for a fact that you want to get serious about doing photography. I would recommend the D7500 or the D5600. These cameras are pricier but have more advanced features that you will really appreciate.
As you can see, the D7500 is a much bulkier camera, but when you hold it you will love the way it feels in your hands. The D5600 is a smaller camera, but its a nice jump from a D3400 or a D3300. Both cameras are crop sensor camera with a 1.5x crop. The D5600 has a 24.2 megapixel sensor and the D7500 has a 20.9 megapixel sensor. Thats a small difference, but if you absolutely want the extra resolution then the D5600 would be a better choice in this department. The D5600 has 39 af points and the D7500 has 51 af points. Auto focus points are how many points of auto focus are on the viewfinder. Af points was probably one of the biggest reasons I upgraded from my D3400, which only has 11 af points to a D7200. The D7500 has a built in auto focus motor which will work with older lenses and the D5600 does not. The D7500 is capable of shooting at 8 frames per second, which is great for sports shooters, while the D5600 only does 5. The D7500 has an ISO range of 100-51200 and the D5600 has it from 100-25600. You probably wont ever want to use an ISO that high but its nice to know that it's there if you'll ever need it. The D5600 has a tilt screen which can be flipped out and placed in many different positions, and the D7500 has an articulating screen which can only be tilted up and down.
Both of these cameras are great. I would recommend the D5600 for anyone who wants a camera for travel. Its a great camera with advanced features in a small package. I would recommend the D7500 for anyone who wants to get started doing more professional photography like portrait sessions and sporting events. The D7500 does include a top LCD screen which is very useful out on the field. I would never recommend it for professional events such as weddings because it does not have a dual SD card slot. If one SD were to fail it would be disastrous for you. The D5600 body will run you about $700 for the body only while the D7500 will cost you around $1250 for the body only.
If you want to get into photography and know that you'll be practicing to get into professional events then I would recommend a Nikon D7200 or a Nikon D750. The Nikon D750 is a full frame DSLR camera and it is a very popular Wedding photography camera.
Both of the bodies on these cameras are extremely similar with the D750 being only slightly larger. Since the D750 has a full frame sensor it will win in low light situations every time. Both of these cameras have 24 megapixel sensors. The D750 shoots at 6.5 frames a second while the D7200 shoots at 6 frames a second. The D750 has an ISO range from 100-12800 (expandable to 51200), while the D7200 has an ISO range of 100-25600 (expandable to 102400 in black and white). Both of these cameras have weather sealed bodies. Both cameras have dual card slots. Both have top LCD and both have built in auto focus motors for older lenses.
Both of these cameras are great, but I would recommend the D750 for low light situations only because it is a full frame camera. I own a D7200 and I love it. I've never had trouble in low light situations and I always get amazing shots. The D7200 will cost you $1000 for the body only and the D750 will cost you $1800 for the body only.
I hope this helps with your decision making!