for seedlings and cuttings i use debco seed raising mix with some vermiculite mixed in
https://www.masters.com.au/product/900007305/debco-seed-raising-mix-10l
for pots i mix my own soil from what i can buy at bunnings/masters
my current mix is
20% Searles 5IN1 Organic Plant Food Range ( 30L dig in bag) (got mine from masters but they dont have it listed online)
40% cheap potting mix as a filler as the 5IN1 isnt designed to be run by itself in pots
https://www.masters.com.au/product/900007421/resource-gardening-potting-mix-25l
and 40% perlite which i buy in 100l bags from the local hydro shop as its a hell of lot cheaper than bunnings.
only just started with this mix but it seems to be going great