Does anyone have advice for a would-be blogger who has no real expertise or industry experience or sources? Is a blogger without those things a contradiction in

Does anyone have advice for a would-be blogger who has no real expertise or industry experience or sources? Is a blogger without those things a contradiction in terms? I'm a decent writer when it comes to formulating essays, and occasionally I say insightful things, but when it comes to broadcasting an opinion piece to the world it doesn't seem viable. Should I just stick to posting on HN? Anyone else start from this situation? (ie. blogs seem like a good IT career enhancing asset but see no reason why you personally should blog)