Yes.  If you have not heard back in a couple weeks it is fine to reach out to the employer to let them know that you are still interested and available.  Following are some sample emails:

Inquiring about status of an application:  

Dear Hiring Manager: (address to individual if you have a contact)  

Given the current situation with COVID-19, I am writing to inquire about status of my application. I realize in these unusual times that [name of company/organization] might not be currently hiring. But I am very interested in talking with you about filling the opening for [insert name of position]. Have you had a chance to process my application/resume?  

Thank you for your time. I look forward to hearing from you soon.   

Sincerely,  

[your name]  

Inquiring about next steps in the hiring process (after an interview):  

Dear Hiring Manager: (address to individual if you have a contact)  

Thank you for the opportunity to meet with you [insert day/time]. I enjoyed learning more about [insert name of position] and how I could contribute. Given the current situation with COVID-19, I realize there are limitations you may be facing. I am writing to inquire about next steps. What is the next step in the hiring process?  

Thank you for your time. I look forward to hearing from you soon.  

Sincerely,  

[your name]  

Staying in touch with an employer you applied to work for prior to COVID:  

Dear Hiring Manager: (address to individual if you have a contact)  

Thank you for your initial interest in my application. I realize that due to COVID-19, you have had to postpone my interview. I am writing to let you know that I am still excited about meeting with you and very interested in the [insert name of position you applied for]. As time allows and circumstances change, I would welcome the chance to interview.  

Thank you for your time. I look forward to hearing from you.  

Sincerely,  

[your name]  

The best time to discuss the details of salary and benefits is when you are offered the job.  Do your research: Find out what similar jobs in that region pay, and make a budget to determine how much income you will need to live.  Benefits you may want to discuss: health insurance, other insurance, paid personal time, sick time, continuing education, help with college debt, etc.  Many of these benefits are negotiable.

First of all — keep searching and keep applying for jobs.  New job opportunities crop up all the time.

Gain certifications.  While you have the time take courses (Coursera, Khan Academy, Udemy, LinkedIn Learning, etc.) and gain certifications that relate to your desired job.  This also makes for a great story to tell at your interview: “I used my time between school and job to get better prepared for this job!”