This was for the presale but assuming it's the same again:
Create your account with AXS or Ticketmaster ahead of time but you don't need to be on this website at the time of the sale
You will get an email with the code and that email has a link saying buy tickets. You use this link to access the sale. Copy your code so you can paste it in, and also have it written down as a back up so you don't have to return to your emails again and waste time
If the ticket sale starts at say 10:00 then the waiting room opens 30 minutes before the sale. Be ready to click the button 32 minutes before the sale starts so you can get into the waiting room
When you finally get in to the sale page, put the amount of tickets you want at the top of the page. Don't select best available as it will put the £662 hospitality tickets in your basket.
You need to research the price levels and know what price tickets you want to buy beforehand and click on that price level first as there is no time to check the seating areas etc when you are on the sale page as you will miss out on tickets.
The price of the tickets includes all the fees, and there are a lot of fees.
What I did (and I'm so glad I did) was use the first presale as a trial run only. I didn't want tickets to the first two dates on sale but used the sale to work out exactly what to do so by the time the date I wanted came on sale I wasn't panicking and knew what to expect
I realise this is all ridiculous for a two hour show next year but I was informed that my DD would "literally die" without these tickets 😂