Strunk & White's
Elements of Style seems an excellent resource, but it is obviously tailored towards those who already have a modicum of english grammar understanding. When the second chapter starts mentioning things such as "pronominal possessives", "conjunctions", "non-restrictive relative clauses" and "connectives", I begin to shudder and wonder how I managed to cope when writing work related scripts and managerial documents; wondering how many howlers I made.
Perhaps
needing to know the minutiae of grammar is not strictly necessary, but it would have been "a nice to know". And as my formal education ceased decades ago, I fear I missed out on some things....(perhaps!)