Hi Juliette , this is the way a would approach the subject of bird photography. (Borrowed from Steve Perry). You may already know this but it is worth covering the basics so you make a good photo-financial decision.
#1 Need to have the correct equipment and be familiar to all the settings.
#2 Develop the correct technique ( Steve Perry has multiple videos on that)
#3 Once #1 an d #2 are achieved , then develop your "art style " or "art license" of the bird images you take.
I do not know where are you based. I live in Atlanta and will giving a talk on " How to photograph hummingbirds in your backyard " n Cartersville , GA . Here is the link:
https://boothphotographyguild.org/c...-to-photograph-hummingbirds-in-your-backyard/ . It covers how to do the set-up, ie feeder , perching , equipment and composition. This also applies to other birds.
I hope this helps.