It's completely fine (and will likely help make you better in the fields you blog about and better at communication in general, which is gold.) Of course you wouldn't want to misstate your experience or qualifications, but it doesn't sound like you were contemplatin that anyway.

And if you are able to communicate what you are doing and why, it will be a help to people who are in roughly the same position as you with an interest in the same thing, which is great.