Or you can subscribe to OneXOX Black RM 10 Postpaid
I helped my mom subscribe to OneXOX since she is a super light user . No Youtube very light usage at all.

Per month gives 1GB and 20 Minutes talk time (all network)
Every month ,unused minutes and data will carry forward

Just in case you think its not much. My mom rarely uses and after years of subscribing
She has 438Minutes of talk time and 40.63GB of accumulated data.

Thats why I ask her - She got so much talktime carry forward, no need use whatsapp call.