Bali, the Gilis or a loop through Java
Ten days in Bali, between Ubud, the south coast and a boat to Nusa Penida, fit in the 3 GB pack if your villa has good wifi; it lasts 15 days. If you book every ride through an app and send videos home, the 5 GB pack, valid for 30 days, is the comfortable choice.
Two or three weeks combining Bali with Lombok and the Gili Islands, or a route through Java from Yogyakarta to the volcanoes in the east, is a 10 GB trip: long transfers, maps open and plenty of photos. If you settle in Canggu or Ubud for a month to work, take 20 GB. The data calculator estimates your own trip, and if you carry on to Singapore or Malaysia, add that country's eSIM: these packs only work in Indonesia.