re: Looking for any help locating owl and eagle nests to photograph.

imo the best way to get convenient practice, if you have a back yard and are near some swamps / forests is to put out feeders / nest boxes and work on all the birds you can see around your neighborhood.

You may be surprised how many species you can see just by spending some time outside and looking for them.

I got started back in '20 when everything was shutdown and I had a lot more free time. The practice you get trying to get clear shots of the little guys who move very quickly will help greatly when trying to get pics of bigger birds.

I use an EOS R and various lenses, my favorite for birding is a Sigma 150-600 - you can get some great shots for a fraction of the price you'd spend on a Canon or Nikon lens of similar specs.