Usually when a new tree is bought, the first thing is checking to make sure you are happy with the soil that it comes with because it makes a lot of difference to the watering routine. If you have a healthy tree and decent soil, watering is going to be the main thing you will concerned with in keeping the tree happy and healthy. In our part of the world and where you are in Woolongong figs are kept outside year round. I'm in Sydney and don't have any experience with growing figs indoors, so if that is what you were hoping to then you will need to get some advice from someone who has experience growing ficus indoors.
Word of caution, in Sydney we have a few days over 35 degrees coming up and I see in Albion Park there are a couple of 35 degree days coming up. Although we keep our trees outside year round, when the temps get high it is wise to provide some shade, especially if you have a larger tree in a smaller pot and you're just setting up a watering routine.
There are a few things that you need to learn with bonsai, particularly with soil, watering and fertilising. You can read plenty on here, on blogs and on youtube. It can also be helpful if you have the time to link up with a bonsai club and I'm pretty sure there is one near (perhaps Urimbirra or Illawara may be near you). At bonsai clubs you can bring in a tree and work on your tree with a community of other people who are also keen and know a bit about bonsai.
MBF are fairly easy tree to work with in terms of pruning. Once you are comfortable with just keeping the tree alive without much fuss then you can consider shaping the tree. There's no need to rush cutting a ficus because they back-bud quite easily. If you have a few extra-long branches you can have a go at cutting one or two back now and see how the tree responds (hopefully throws out some new buds in a few weeks). I would also suggest because it looks like there is no fertiliser you go to the big shed and get a slow-release fertiliser which will help with budding when you cut back.
If you still have the sellers contact details it may be helpful to ask them when it was last repotted, if any fertiliser has been applied and if they know what type of soil it's planted in. Those are not necessary, but helpful to know.
When you have time have a look around the net at some pictures of ficus trees with a similar structure to yours and then you can think about a style you would like to work towards. You have limitless options if you ask for an opinion, sometimes it's better if you suggest roughly how you would like the tree to look and ask how you can achieve that look.
It appears the tree has scale insect
https://en.wikipedia.org/wiki/Scale_insect on some of the leaves. These can usually be removed by hand or gently with an old toothbrush and water. It's a good idea to do that sooner rather than later because they can multiply or spread. Sometimes ants farm scale insect which can be a pain if the ants are inside your pot. Also, you can remove any dead, yellow leaves.
Great looking tree, would be interested to know how much it cost.
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