Try taking a calmer approach and stop being so hard on yourself. It is not your job to entertain her it is your job to help her explore the world and learn about it.
Watch her carefully. See what she is interested in, what she reaches for. Find ways for her to explore these things.Extend her experience by finding similar things for her to explore and experience.
Talk to her lots. Listen to the noises she makes and make them back to her. This is her learning the art of conversation.
Explore your kitchen cupboards together. How many different noises can she make with spoons, pans, tins and packets. How many different textures can you find for her to experience.
Then do the same somewhere else, your bedroom, the garden.
Sit her in the bath with a load of flour and water paste, cornflour and water mixture, paints, anything sloppy really and let her explore it's properties.
Give her a big dish and some dried pasta to hold, move, throw around her etc.
A big box of shredded paper or scrunched up newspaper can be great fun.
Try to work out what she understands and what she is thinking. Discovering the world with a baby can help you to see it through new eyes too.