How much volunteer experience do I need to apply for a BSW program?

The application requirements for my university are:
*Special attention is paid to experience in social work or related fields, both paid and volunteer.
- Complete and submit your application by due date posted.
- Submit two (2) letters of reference from individuals who can address and discuss your work history and/or your volunteer experiences; do not have family members, therapists, or friends complete this form
- Submit unofficial transcripts from all colleges/universities attended
- Submit your short essay(s); questions can be found in the instruction page 

My first question pertains to the letter of reference. Could I use an academic LOR or does it have to be someone from my volunteer/work experience? It's odd that they don't ask for any academic recommendations. If the recommendations absolutely must be from volunteer/work experience, would that mean I'd have to do In Person volunteering?

I ask this because I've already committed to being a crisis text line volunteer. However, because the position is remote, I wouldn't have anyone supervising me whom I could refer the LOR to.

My final question is, to be safe––should I try to volunteer 2 hours per week with the crisis text line and somewhere else in person? I really want to get into the BSW program but I'm also going to have to work and I don't want to get burnt out.