AusBonsai

Just "planted" (placed them on some soil) my Ficus Rubiginosa seeds . Placed 3 sheets of newspaper on the bottom, some potting mix, and chucked them on top. ended up doing some sort of jerry rigged greenhouse. Basically placed a sheet of plastic ontop of the tray to keep the humidity. Will probably be watering by placing the tray in a tray of water. How often would you guys recommend watering the seeds? I've put them in a nice shaded but warm spot. Will probably take some progress photos. any tips would be welcome!

Cheers.

Just keep them damp until they germinate- only takes a week.
The sheet of plastic should retain moisture so may only have to water every few days but keep checking and water if it starts to look dry.

How long should I leave them till I move them into seperate pots

Same as any seedling - You can start to prick them out into individual pots as soon as they are big enough to get hold of but there is no problem with leaving them longer. I have a tray of seedlings that are now 3 years old still waiting to be potted up They have been pruned a couple of times and some will have fused together by now but they will still develop into bonsai when I eventually get around to potting them up. Too late in the year for me to pot up now but you'll have a much longer growing season.
Usually the sooner they have room for roots the quicker they grow.

So the answer to your question

How long should I leave them till I move them into seperate pots

whenever you have time.