I would get some pictures depicting landscapes and nature, these can be an escape to look at and it's good to have pics of nature for your health. And then some pictures of what interests you and what you like.
First, measure the space where you want to put the art. This could be one big pic or several small pics. Your choice. Make purchase(s) as per your preferences and the space available. Given the huge white space in the photo - my preference would be for 3 smaller pieces, but you do you. Maybe one medium size and two smaller ones. This is def your choice and preference. If the sun shines directly on that wall, don't buy prints as the reds will fade fairly quickly.
There are art shops like the Picture Gallery. Also markets like Ceres/Fairfield often have booths for local artists to sell their creations. Also the Saturday Rose St art market in Fitzroy. With xmas coming up, every artist in Melb is looking to downsize their stash of finished works at a profit. Check out opshops like the Brotherhood or Vinnies for cheaper options. Some surprising gems can turn up there. This can be a fun thing to do on a weekend.
You will also need :
The actual piece(s) of art.
A way to attach/hang the art. Do you want this (or is it required) to be removable when you move out? I think the rules have changed recently for rental properties, and you no longer have to erase any signs that you've hung a picture. So you can consider nailing a picture hook(s) to the wall, and are not limited to those removable stickytape backed hooks that fall off if the temperature goes over 30. Be aware that using double sided tape can remove paint from the drywall, which will need to be rectified when leaving. Attachment/hanging will depend a bit on how heavy/large the piece is - Bunnings DIY online may help.
A piece of news/brown/wrapping paper (cheap xmas paper is everywhere rn) cut to the size of each art piece. Some painters tape or masking tape cut into small sections.
A tape measure of some sort and a pencil.
Position cutout(s) on the wall using the painters tape until you get an arrangement you like. Use pencil to mark where the corners should be, and the top of the item. Use the tape measure to find out how far down from the top mark you'll need to put the attachment point. Fix that to the wall. Hang art. Check the corners line up with pencil marks then erase the pencil marks with a small piece of fresh bread or a regular eraser. Job done.
There can be of course a fair bit more to it than this summary - consult youtube for one zillion how to do it videos. Some of them are even accurate.
Thank you heaps for this!! I might head to one of the markets this weekend to snag some nice n cheap art. Obviously this is down to personal preference, but do you know what alignments would look nice? For ex, say I have two posters - I might do a side by side. Or if it's 3 medium sized ones then I could put them up diagonally? Where do I find more inspo...
On the picture hook, won't that still leave some damage behind or is that ok to leave as is?
Used to have to remove picture hooks and repair the 'damage'. Nowadays, I believe it's ok to leave any picture hooks in place. I wouldn't even bother consulting the REA.
Re alignments - Getting two same sized pieces exactly level is a royal PITA. I would go for a stepped arrangement every time. Smaller pieces look great diagonally imo. A lot depends on how colourful or whatever the pieces are.
The kicker is the string/wire/little eyelets on the back of the piece for hanging. These are NEVER exactly the same from piece to piece - hence the need for a tape measure to calculate where to put the attachment point for each piece.
Random can be fun if all the pieces are differently sized or have different frames. Or put a giant plus sign on the wall with painters tape, and put each piece in one of the quadrants close to the crossing point. That can look fantastic if all the pieces are different.
It really is a matter of you do you. No-one can tell you you're wrong .. I think there's a song about that.
You need colour. Something bright and vibrant. A pot plant might help too if you get enough light.
hang some white Christmas lights behind the bed head too for some softer light when required.