Welcome
@Skyzone to the forum!
And that sir is the million dollar question. Depending on your budget and your level of experience will drive an outcome for you. You’ve noted that your a newbie, so the consensus around here is to probably start with a smaller 2-3” quad (e.g. Diatone 339 or 349, Emax tinyhawk 2 or similar), a set of EV800D goggles and a Taranis QX7/S ACCST and you can get into the hobby/addiction/money pit without offering up a kidney ($700 AUD).
The main reason for going down this road is that if you are new to the quad scene, you don’t know yet what you don’t know and building a quad racer can either go really well or end up really badly (ka-ching). You can certainly go out and grab a 5” racer in a BNF kit, like many of us here did but in my case, it took me a long time to fly it reasonably well and I spent an incredible amount of time and money rebuilding them.
The smaller quads are nearly as quick as the larger ones, crash better (?) and are great to learn on. Having said that, I have a reasonable collection of quads (about 15 at the moment) and I have some great 5/6” rigs amongst them, but it cost me a lot of money and grief before I realised I was doing it back to front.
Finally, we are talking analogue quads, if you want to go to a digital setup, double the cost of pretty much everything. They are awesome quads but you have to be committed to run with it.