Nobody can be an expert in everything. When you are unsure about a design decision, do not be afraid to reach out to a design professional. Many people make the mistake of thinking that professional interior designers are there to purely address aesthetics.
As you have probably noticed, there are Instagram feeds that are more curated than others. However, there are some that take it to another level. I am a bit biased since I teach color design, but there are some notable, well thought-out Instagram feeds with beautiful color stories that I could scroll through all day.
When interior designers present two dimensional drawings a client will sometimes request a 3D model or a rendering to depict our ideas more clearly, which we are more than happy to do. Sometimes, clients think this is a waste of money. Mock-ups of any sort can often save you money.