Are the furnishings in the photo yours? Are they staying or going?

I think the easiest and least expensive solution is fabrics, chair covers, pillows, rugs, artwork, and more round things. I think lots of angles tend to make it look more modern, but often more manly.

How long will you be there? What colors do you like? Do you have any themes? Animals, florals, scenery, etc. Try coming up with 2 or 3 colors. Looks like there are no window treatments? The other good thing is with art and fabric things, you can put theirs in a box, put yours out and then replace yours when you leave. If you are there 6 or more months you might want to look at painting, less time, just go for the art work and fabrics. If you make it all cohesive, you can base any future place on these items. It will be like carrying your home with you. have fun and let us see.

Do you want/ are you able to remove anything and store it, for example, the large rust/ terra cotta item from wall? Buy Home Goods canvas art using colors from floor rug since you said you like the colors.....