Spoimala,
you have to appreciate that America is still a young country (only 200 years old), but in that short time has excelled in destroying the English language

In America "Grammar" is probably an ageing relative married to "Grammpa"
Apologies to all Americans - just kidding.
"Educated" is a relative thing too.
On a serious note, you do need good English and good grammar for your album/lyrics/website, but you should also consider the following:
If you are going to be a world-wide success, then many of the readers will have English as a second language. Clarity will be more important than perfect old-school English grammar. Strange, old fashioned English words, correct as they may be, should be considered against a more general understanding.
Again, your market will be predominantly young. I personally feel that you should avoid text-message styles, but also maintain a balance that speaks to your audience in a "language" that they understand. Perhaps I'm too old for this, not having much contact with the age group you're aiming at.
Having said that, I do do a lot of proof reading for friends and even correct spelling mistakes and "tryping mitsakes" on my wife's shopping list!
If you want my help, I'm only too pleased to be of service.