DoT then.
5.1 is "normal", as in most readily available.
Get a smallish bottle from your local motorbike place, I find that the cheapest/volume by far. (Other than buying huge bottles).
Then watch YouTube clips. (Might need to source yourself a bleed kit too)
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
And it depends how good you are at bleeding, and how much you lose each time.
I've known people go through 250ml of fluid and still have badly bled brakes, which seeing as they only hold ~10ml, is an achievement!
Never done it before Matt but been watching several videos on it and doesn't look that hard.
Sooner try and do it rather than pay a LBS...you don't achieve anything.