Hank

I want to make sharp images of birds from a distance. I have a budget. I have a couple of good Canon lenses so I want to stick with Canon. I’m thinking that a used Canon 7d Mii and a Sigma 100 - 600 would “get my foot in the door” for birding and wildlife photography in a way that I want at a relatively reasonable price. I could learn with these and take pretty sharp pictures? Or should I invest in a camera with more pixels? How much do pixels really matter when you get over 20 megapixels? Should I try to get a 30 megapixel camera? It would be a pretty big jump in price.