Welcome to the forum Ramzi and good to hear of your success.
I'm not familiar with the 136 or if there are any entry conditions pertaining to it being granted but if so then ensuring compliance is first step.

As to entry to Australia, there are regulations on what you can bring into the country and I'd start by having a look at the immi site - Citizenship & Living in Australia
If your visa is in order and you have no forbidden items (and declare any food, plant, timber, shell items etc.) clearing immigration and customs can be as quick as an hour or so, just depending on point of entry, how quick you get your luggage and what sort of a queue has developed

I'd expect you will be giving thought to where in Australia business interests/employment might be best for you and you can use sites like www.domain.com.au to look at accomodation options/costs, Sydney in particular being regarded as a tight accomodation market.

You can also open an Australian bank account online - Moving to Australia and some other info there too, and money wise you ought to do some planning in regard what it will be costing you to live per week, a minimum budget of something like $500/w is a guide but could be a lot higher depending on what your accomodation intent is on arrival, and for first weeks if you use hotel accomodation, something more like $1000+/w would be more like it.