You have to remember that people don't post on BYC when everything is going perfectly, they post when something goes wrong. Proper management, adequate space, good feed, appropriate breed choices---these are things that go a long way towards having a healthy flock, and you should have few issues especially if you only have a few birds. Read as many posts as you can by
@Beekissed and follow her management suggestions.
If it seems overwhelming, what I'd do is find an experienced neighbour or friend to mentor you, and only listen to them. They've kept birds alive and laying, their advice can't be that terrible. Then as you gain confidence you can research, change your methods if you want, and eventually become independent in their care. If you don't live in a place with many bird keepers, then I guess you're stuck with us.
One thing I now recommend to every single person is to have a plan for euthanasia. Your birds will die someday, and unfortunately a quiet death in their sleep doesn't happen all the time. You owe it to them to have a way out so that they aren't forced to die slowly from some terrible injury or disease in case the worst happens. Me, I had my neighbour shoot them until I was confident enough to do it myself. Nasty part of chickens, I know, but IMO it's one that ought to be considered at the start. Don't let me pee on your parade,

, just be aware that this might happen.
Good luck, and I really hope you decide to get chickens! They are such a joy.