Need help cleaning up my computer and improving performance

I'm looking for someone to clean up my computer, remove unnecessary files, organize folders, and optimize startup programs. I mainly use it for work and occasional media, so I’d like guidance on best practices for file organization, quick cleanups, and minor software updates. I prefer someone who can explain steps simply and ensure backups before making changes. Please include whether you can also check malware safety and perform a basic cleanup of browser caches and junk files. I’m flexible on timing and would like a session that won’t disrupt my work.