1.5 years experience. Looking for a job switch in Enterprise Networking field.

Please help me with these questions. Currently I am planning to make a switch.

1. How long should I keep the resume.
2. Naukri or Linkedin ......(cold emailing i will be doing based on the company)
3. Should I go for hiring agency while searching for Job.
4. Hints for getting remote jobs
5. I also want to switch to cloud domain, should I fake it during interview or I should be honest.