Clueless on Decor!! Please Help
If you are really unsure and want some guidance, hire a decorator (they are usually cheaper than designers but it depends on where you live as in some places there are no regulations saying decorators (or anyone else) can't call themselves designers vs it being an actual designation meaning someone has enough education to do structural changes). Anyway, in theory, decorators strictly stick with decor vs taking out walls and such and that sounds like what you need.
I don't know what they cost where you are, but can tell you you can normally hire one for a consultation which is about 2 hours of their time (here that would cost you about $250). Consultations are nice when you need direction and ideas. They normally talk with you, look at your space and needs and give you ideas and suggestions. If you want a final plan, you pay extra. By the time they leave you usually have some suggestions for furniture and layout, paint colours, accessories, storage ideas and whatever else you like to know.
I've had this done and what is nice is you realize it's not an all or nothing deal. You can find out what to do in stages so you can do what you can one year, some more the next, etc. You also have an idea of which pieces of furniture to buy first, what type, what size, etc. so you can look with more confidence when you do shop. It is nice to have a list of criteria when you are shopping so you aren't so worried about making costly mistakes.
When I moved into this house, none of my furniture would go through the door and I decided I needed advice to save making any mistakes with all I had to buy. That designer help was invaluable as I now knew the size of sofa and that I needed only 1 chair no bigger than a specific size (no room for 2), forget a coffee table and use end tables, etc. all because I am in a really small house. The furniture is also arranged in a way I would never have come up with on my own because the designer had a fresh eye on the space. She also spotted things I would never have seen when it came to things I might do in the future like knocking out a closet wall to make more room etc. What was also nice is she saw ways to use things I had which wouldn't have dawned on me because I was so used to using them in another way. So it was well worth the consultation cost.
I hang around decorating forums all the time and while they are really helpful and people have really good ideas, there is something about having a plan for your own house and ideas by someone who really knows their stuff. Then you can hit forums and say "I need a set of bookcases (or desk or whatever) about xx size, and could use some suggestions".