I recently decorated our beach condo on a budget. Items to consider are bowls or clear glass vases with found shells displayed. Sisal rug and woven baskets make a coastal feel. The baskets are great for storage as well. I used white light and linen drapes found at ikea.Because of small size of room, i have glass tables to help maximze space. I am adding shutters found at a flea market as headboard for guest bedroom this year. I found many useful items from community sales. I frequent local beach decor shops some pricey to get ideas for arranging and adding items. I would put couch so can look out window to garden. Put it floating in the center of the room, Tv on wall. Two chairs sort of where they are now in photo. Small table and chairs located near door and kitchen. Looks like not much space there but look at ikea furniture as it is for small spaces. One ikea table is shown to be against wall and then pulls out to enlarge, it might work for you.

If you want colour a different coloured rug would work eg Aqua tones. But for black and white tones the rug you have is great. The pattern draws you eye and adds to the room

Thanks for the suggestions. I can't hang or mount the tv as I'm renting. The tv won't fit in those wall gaps either :( Ideally I'd like to put the tv on the main wall and put the sofa opposite but I think the sofa would be too close to the tv and there would be only a very narrow walkway behind to access the bedroom and bathroom. It's tough! I think having the tv in front of the window may be my best option. Not much direct light gets in due to the fence and trees outside the courtyard. There are also blinds which block out the light. Here are some ideas I'm going off at the moment: https://www.houzz.co.uk/photos/south-florida-family-estate-modern-family-and-games-room-miami-phvw-vp~2830052 https://www.houzz.com.au/photos/urban-family-getaway-contemporary-family-room-dc-metro-phvw-vp~3206796

Thanks everyone for your kind contribution and feedback. Thanks especially to allanaspree for taking the time to photoshop your ideas into the photos - the centre table looks much better with your simple suggestions J (see post) I’m taking it all on board and will post the after photos.