Tengwar and Cirth alphabet.

Hi! As a newcomer in the world of elvish I'm wondering if there is a concise and accurate collection of the cirth and tengwar alphabet + their use. I tend to find different suggestions for both the symbols representing the letters and the use of diacritical marks before or after consonants. Can anyone recommend a reliable source? Hannad! / Elo

Hi!

For tengwar, I recommend at.mansbjorkman.net as a comprehensive source of information.

Thank you!