While strong writing skills are a plus, they're not an absolute necessity to start a blog. The most important thing is that you feel genuinely interested in your blog topic and make sure to follow a logical structure in your blog posts. The more you write, the faster your writing skills will improve. Follow and read other blogs in your niche to find inspiration for creating clear outlines for your articles, formatting them to increase readability, and focussing on a single topic in each blog post.