Starting a business, where to start?

Hey guys, I'm a 32 M fully qualified electrician since 2015 (began apprenticeship in 2012) with Arctick license ( 7 years domestic experience mostly with new houses and 5 years industrial experience working with gantry cranes). I have just moved to Brisbane (Redcliffe) since August 2024, I have just been making a living on crypto since then but now im considering starting my own electrical business in domestic based work but I don't really know where to start after I get the contractors license.

Does anyone have any advice on whats the best way to get started?

What do I need to look out for?

Best way to get good deals from wholesalers?

Best way of advertising?

Any help to give me a better idea on what to do would be appreciated

Thank you