Everything Gary said
Talk to your accountant. To sum it up, when you invest your super money, the general rule is that you cannot use the principal or the interests for personal use until you are entitled to the pension or benefit from them in anyway.
Let's say you buy a property with your super money. You obviously cannot live in it or have anybody remotely related to you pay a 'rent'. Under extreme circumstances, terminal disease, etc... there are options to access your super money before entitlement, but these are exceptional.
All you need to start an SMSF is an accountant to set you and all members as trustees, an ABN, a tax file number and your money. Beware there are a lot of chonky 'financial advisors' out there and they got people in strife with the ATO. So you'll need to do your homework.