If you learn something, just write about it. Don't overthink it. Likely no-one will be reading your blog unless you have something super unique/interesting. If

If you learn something, just write about it. Don't overthink it. Likely no-one will be reading your blog unless you have something super unique/interesting. If you have something really compelling (eg, solved some problem other people are hitting) it doesn't matter too much how good the English/blog structure is; as long as it has useful information, you are winning.