I know starting cosplay whether just wearing them or making them can be super scary to start. Be patient and kind to yourself as you get started though. Everyone makes mistakes and starts somewhere. Even I have my own list of failed projects that I just had to practice and try again. To help you get started though, here is a TON of resources to help you learn to cosplay. You can find everything from my own how to content like my blog and Youtube and a ton of tools and materials myself and other cosplayers recommend using. Good luck!
There are lots of other cosplayers with resources too for people who want to learn about the many different aspects of cosplay! These are some of the cosplayers I have looked up to or learned from that you can also refer too! They can also be great to look to for inspiration.