It’s fine to celebrate success but it is more important to heed the lessons of failure.
Here, the puzzles you have just tried are explained. The ones you have failed are highlighted red.
Black to play
This is just a simple case of locating the stone or group with a single remaining liberty. If you can't see it, don't worry, it is a developed skill.
Three liberties out of four are already taken. All Black needs to do to survive is connect to his remaining stones.