Decide what your focus will be so you can target a decor niche e.g. decor ideas, renovation tips, luxury interiors.
2. Learn wordpress and set up your blogging website
3. Define a look and feel to your blog with your branding
4. Research a list of topics to write about - 365 Blog post ideas for interior designers is an ideal starting point
5. Define your writing style, writing like you speak is a good starting point to building a personal rapport with your audience
6. After you write each blog make sure you share it on social media and through your email list