My de facto and I have agreed on a figure and happy to sign the consent order for me to retain 100% of my property.
Unless you have been living as de facto for 2 years or more then there is probably no need to even bother with an order.
Assuming you have been together at least 2 years, & since you have agreed on a figure, I'm also going to assume that figure is to buy out his interest in the house, or at least a figure to bring to a conclusion your financial relationship & formalise the agreement.
Regarding the consent order application .... It's not mandatory for you to engage or even consult with a lawyer to do the application... That said, it is advised you do, & if you are not confident in filling out the application, you absolutely should spend the money to have a lawyer do it.
One reason being you want the orders sought written in a way that is clear & unambiguous. That directs each party to do whatever is necessary to bring into affect what you want, a date to do it by, & what is to occur if one party does not do whatever is required by that date.
There are sections of the application that (if they don't apply to you) can be drawn through or omitted... Important that you still sign each page though even if you don't fill in any section of it.
The court registrar who's job it will be to go over your application has to be satisfied that the orders sought are just & equitable to both parties.. That requires that S/he knows all the relevant circumstances, hence all the questions... There is also a duty of disclosure... Usually all property & financial assets need to be declared (even those that are not jointly held) Failure to do so can leave you open to an application for an order to be seat aside due to non disclosure.