You can decide what basic style you are going to go with and start looking at pieces you like , make note of where they are and pricing .Color palette maybe but I usually wait until I am in before deciding color. Beds are important IMO so maybe start there with some ideas for the main bedroom. Choose size of bed and maybe the bedding to start .

There are millions of pictures available. Start looking at different rooms and make a mood board of what you'd like your home to look like. What are your favorite colors? Do you lean toward any particular style? What kind of floors are in your new place? What color are the kitchen cabinets and counter tops? Does the space have lots of natural light or are you working with spaces that are a bit darker? Will you be able to paint? Work on your budget and decide what you want to spend for each room? It can get expensive quickly unless you like to shop thrift stores or Facebook Marketplace. You can start an ideabook here on Houzz to post rooms you like. You'll start to see a pattern coming together in what you choose. Do you have the budget to do everything at once or will you need to acquire things as you go? Decide what pieces are worth an investment since you'll want to keep them for a while as opposed to accessories that are easy to change out. You can do so much planning ahead of time and worry about sizing things to the room measurements when you move. Planning ahead gives you something to look forward to!

We bought our house here in Florida sight unseen but I knew (or thought I knew) what I wanted before we moved. After living here for 12 years, I've started changing things over from tropical to an organic modern look.

You buy nothing without a plan that includes a measure onsite, all the walls, windows, passages, etc and every foot and inch.

It's currently occupied, ? It has no floor plan of any kind available to you? Do you have ANY picture of "the new place"?

Are you renting or buying? If renting, versatile furniture you can move again or sell online would be best. If buying, choose what fits once you move in.

The most important planning starts with a budget and a measured floor plan. You can work out a budget range for the initial purchases and for the next year.

Cheap stuff, really cheap, can be valuable to let you find some things you'll want to keep. You can find basic pieces on FB Marketplace, Craigslist or Habitat. As you find what you want the used stuff goes back online for someone else. Lexington Furniture Link represents lots of US companies. They drop ship for lower prices.

As exciting as it is, without measurements and being in the space, I would be hesitant to do much. When we moved into our first house our dining and living room was empty for many months while we sourced things. Well worth it