Here is a shot with the Mark IV at 3200 ISO. Still a lot of detail in the image.
Here is how I shoot and process a high ISO shot.
1. Always expose to the right. Even if you have to take the ISO up to higher levels than you would normally use.
2. Open in PS. Set the slider for the sharpening to 0. Radius 1.
3. View at 100%
4. Then slide the Luminous slider over until you get the desired noise level.
Note: with a little experence you will do this very fast. It is also important to know the characteristics of the sensor you are using. I use the 7D and the Mark IV and both are different. Both use very different de-noise.
5. Then slide the sharpening slider over until you get the desired sharpness back. Be careful here. It is very easy for you to over sharpen. It is a learning process that everyone goes threw. In the beginning I over sharpened everything. I still think this is one of the hardest parts of processing a photo.
All other settings I keep at the default settings.
There are many good articles on the subject. But I keep it simple. I use one program to do it all. And for me PS seems to do everyting I want it to do.
Don't forget after you process and convert and ready for showing. Go back and tweak it some more.
I used Elements for a long and it is an excellent program for birders IMO.
Have fun with it, keep going and do not get discouraged. It is just a hobby for me, and most folks I know. Very few actually make a living at it. The only ones that make a living around here are the bird guides.