Four problems I see so far.
- Your evidence is hearsay, which, while admissible under the less-adversarial rules for evidence that apply to family law matters, won't hold credibility enough to persuade a court that a child should be removed from a parent's care.
- The fact that your evidence is hearsay and that you have not witnessed it for yourself leads me to question the extent of your involvement in the child's life as yet. You would be facing an uphill battle to argue that it's in a child's best interests to be removed from their primary attachment figure and placed into the care of a grandparent whose only knowledge of the child's lifestyle and routine is what a friend of the mother has told you.
- The complaints you've listed about the parenting style are not serious enough to persuade the court that it should remove a child from the care of the parent.
- You're a grandparent, which means the child has rights to spend time with you, but you don't have the presumption of parental responsibility and are therefore unable to make decisions about the child unless the court orders otherwise. This is a very difficult order to have made.
Kids have a legal right to know, spend time and communicate with both parents on a regular basis, and parents have the benefit of a legal presumption of parental responsibility, which means the parents are automatically responsible for decisions about their children. To rebut the presumption that the parents should be in charge of decisions about the child, you would basically need to show that the child is at risk of harm caused by family violence, neglect or abuse.
While you may not agree with the mother's parenting style, it's unfortunately not your decision to make, and it doesn't sound like the child is at risk of harm caused by family violence, neglect or abuse. To the contrary, I would argue the child would be at more serious risk of psychological harm if he were to be removed from the care of the primary attachment figure, that being the mother.
Sorry if this isn't what you want to hear, but I would hate for you to waste time and money on court proceedings that have a minuscule chance of success.
If you do want to pursue orders, though, your first step is to organise a family dispute resolution conference with the mother to try and negotiate a settlement for the dispute without court intervention. If you're unable to reach agreement, you can file for parenting orders through the court. The court will only make orders that it deems to be in the best interests of the child in accordance with considerations listed under section 60CC of the Family Law Act 1975.