Some websites that help you build resumes for free are:
https://www.resume.com/builder#Step1
https://www.jobscan.co/resume-writing-guide
https://novoresume.com/resume-templates
https://www.theresumebuilder.com/
For cover letter resources, check out these links:
https://resumegenius.com/cover-letter-builder
https://www.cover-letter-now.com/
https://www.glassdoor.com/blog/guide/how-to-write-a-cover-letter/
Interview Resources:
https://www.indeed.com/career-advice/interviewing/job-interview-tips-how-to-make-a-great-impression
https://www.forbes.com/sites/jonyoushaei/2014/10/20/12-surprising-job-interview-tips/#7b0381de50f4
https://careersidekick.com/interviewing-tips-how-to-pass-a-job-interview/