Brisbane computer shop recommendations?

I went to my closest computer store and the sales rep was the most unhelpful neckbeard I've ever encountered. I am no professional but I know enough to build a PC for gaming purposes. He however had no idea what he was talking about.

I went in asking for a 2-in-1 laptop suitable for a STEM student. I had some basic spec requirements and budget in mind which I shared. He then recommended a laptop about $10,000 over the budget I mentioned, with absolutely overkill specs. I said to him that seems a bit much and he asked what software I'd be using which I told him. He then flipped completely and said I just need a Chromebook. This was about $2,000 under budget and not even close to the specs I asked for.

TLDR: Are there any computer shops, anywhere in Brisbane, that can help me with the differences between certain models and specifics to help me decide the best laptop for me?

I genuinely want someone who will nerd out on the specifics and over explain it to me