This is the cheap Glass drill bit set I brought that works well https://www.ebay.com...tm/293892295596
All you need is water and watch a few youtube videos that show to just let the weight of the drill do the work and not press on it.
As for the mesh I would replace with this. https://www.ebay.com...m/133850734950
Its what I use for everything. Its Stainless steel mesh, mesh: 100. You can buy higher mesh count but costs more.
On another Note, I travelled yesterday to and around the area of pelican park, Moreton bay and saw a huge Camponotus consobrinus infestation. Their Majors were HUGE! We picked another spot and I was not able to get a picture but there were like 20 nests within a small 6meter area. I wouldn't wanna sit there for a picnic. They seemed to LOVE the sandy soil and sea breeze.