So … is your issue that you don’t know how to download
- PDFs?
- Application packages?
- Destop themes/icons?
- Use streaming music/video players?
- actual Distro?
I’m a bit confused as to how to reply because your question is a bit vague on your specific issue.
If you just want general guidance and references on Linux/Bash in general, this other post has many detailed posts that cover various different aspects of the very wide scope of what could be your intended target. You need to pin it down for people to help you specifically.