That's fine, the missing bit is when you entered; it has a bearing on the whole thing. When did you enter?
Have you considered the two year UP probationary visa? There's recent precident for UP's applying successfully for settlement whilst in overstay status, and advisors have successfully put forward applications without mentioning any concessions. There's some people here who have assembled all the stuff for the UP who can provide some tips about what's needed. I have a sample UP sponsors letter on my site. Switching into other categories - outside of the UP - is awkward for visitors in the best case and nigh-on impossible without unspent leave.
Additionally to your need to develop a strategy for the longer term, it makes very good sense to cover the event that you get nicked while you are assembling your strategy. That can happen from any random circumstance, a license check on the motorwy, being on a camera when somebody commits a crime, a traffic accident, or even a jealous co-worker. And if they call screws, you'll be bundled off to detention until the IND can find out who you are, which could take a couple of days. During that time, you'll talk with an advisor, but you'll also have to fill out some forms and have 1 or 2 interviews with IND.
A black biro, a phone card, your passport, a sheet of paper with your partner's contact details on it, your advisor's details, a long novel that you were planning to read, and most importantly, a letter about 1 1/2 pages that explains your circumstances. It's because filling out forms and interviews take place in stressful and sub-optimal conditions and I advise that it's better to have your thoughts collected and organised. The rest of the time you just wait until they figure out who you are, hence the novel.
So you would carry that stuff with you while you put your UP app together. If you have questions about the app, just chime in.
One last thought: it might be worthwhile to consider your wording and phrasing in describing your circumstances - and how to differentiate yourself. If you put it forward that you're a freelancer who doesn't keep much in the way of records, it's like going way up in their faces that you're a dodgy person - like a drug dealer or some such. It doesn't bother anyone on the forum here, but it helps to remember that IND are on the policy side - and they are paid to think up stuff like that. And if you set them off on a tangent, everything will take longer.
