What climate zone are you in or where are you located? Can you take a photo that shows the entire front yard? I can't tell where you park or how guests walk to your front door. If you search Houzz for 'entrance gardens' you will see many examples of homes with wide paths leading from the street to the front door. Do you like to garden? You have a lovely house and would not want to hide any of the porch area so keep the plantings around the porch low. You can plant some taller plants at the base of each post but these should also stay low and not get higher than 3' to 4'. It looks like the garage may be in the back of the house with a fence along the driveway. You could have low growing roses along the fence and flower beds at the front of the house if you like to garden. Location and more pictures would help us to give suggestions for the garden.

At this age you should just ask for favorite colors, and then you pick the complimentary covers. Real privacy demand won't happen until about 11 - 13, so right now just concentrate on making it beautiful. If it is pretty and functional, they will love it! Buy furniture pairs so when you do split them up they each have basics. Advice about dividing the room generally is good, but you don't want big sister declaring any territory! There is a crown detail you can do over a bed that includes curtains down on either side - can provide privacy when you sit up in your own bed - consider this as they get a little older and won't pull it down while hijinxing. If it is beautiful and the textiles are in a color they love (or two colors that work together, like pink and lavender on a spring green or taupe wall &/or turquoise and spring green on a buttercream yellow wall ) - then they will see that they can also be different people who are harmonious together. At 7, she is old enough to pick a great color, but don't ask the 5 year old - her taste is changing daily - just surprise her with something all her own that works with sister's pick. I like the look when people select soft goods that match except for color and find one great print accent pillow that ties colors together for both beds. Stay with neutrals on furniture - you can paint out different stuff so it is tied together with pale gray paint. Think mostly about function - Add shelves and cubbies that hold baskets for stuff - stuff changes but they always have it. If you have room, give them each a desk as they approach 5th grade.

Depending on your goal....beauty?it could be a lovely art piece(tall and slim) ...or function? A corner cabinet for shoes , bags ,coats?...these days home represent a place to relax and rest so I am of the school that the first thing you see as you enter should set the tone of your home,makes you smile ,or feel good

The photo gives a bit of an idea , but an inside shot would really be needed , plus an idea of your favourite things . Probably the two best guesses would be art on the walls , and/or plants . Plants would only work if it 2 metres or more deep , but boy could you have fun , with different coloured leaves , textures , heights , leafy plants , cactuses , all sorts . A marble statue or a rock water feature depending on style and taste . Art is more personal -- family photos may be important to you , or you may like WW2 planes , or large colourful abstracts may suit your tastes and draw looks . Other things like a wallpapered feature wall , even timber may work , but you need to suss out what suits YOU -- unless you want a home and garden magazine clone .