Nobody here can predict the outcome of your case. Every single case is different, there's no real formula, it's all decided case-by-case.
What I can say is that the court decides all parenting orders based on what it determines is in the best interests of the child. The full list of considerations is under section 60CC of the Family Law Act 1975, which I suggest reading, but it's generally accepted by the court that it's in a child's best interests to have a meaningful relationship with both parents. It's going to be difficult for the kids to embrace and enjoy everything your household and the people in it have to offer if they're only going to be spending five weeks a year with you, during holiday time which is when the rules and 'daily life' routines that kids need from their parents go out the window.
If you lived closer, I'd say one weekend a month and half holidays is not enough, but with the challenge of distance taken into account, one weekend a month and half holidays is a reasonable ask. But, I'm not the court, and it's impossible to predict outcomes. They're rarely ever what you expect.
What you can expect on the first day of court is two or three minutes in front of the judge. He'll ask you a few questions, probably about when the kids saw you last and why they're not seeing you more, how you plan to facilitate more time if you live so far away, and then he'll put in some interim orders and maybe order you back to mediation to try and negotiate an outcome by consent in the meantime. Since the holidays are over now and the next period of holidays isn't until March/April, you might end up with one weekend a month in the meantime, since the court might not want you to go another three or four months without seeing the kids, as would happen in the case of just half holidays.
But don't get too discouraged if the interim hearing doesn't pan out as you hope. The first interim orders we had were identical to the parenting plan that had prompted my husband to file an initiating application in the first place - he went from seeing his daughter one overnight each week and two nights every second weekend to only seeing her every second weekend. The reason for this was because it was the only proof the judge had of their ability to reach an agreement. My husband was understandably crushed, particularly as the mother gloated at length about her 'win' in the first mention, but we persisted and ended up with week-about care arrangements - three nights more than what had been in place before, and with five fewer changeovers.
So don't dwell on it too much if it doesn't go your way in the first instance. You never know what the court will do.
