I’ve put together a free video series of learn Mandarin videos on YouTube. If you’re a beginner, have a look. If you know a beginner, have a look as well! Hope it helps.
Mike Laoshi
Thank you Mike, very useful for beginners like me. If there are any working pinyin tts (text to speech) engines, one would have almost everything together, for learning a little more without any teacher, assuming found any useful beginner books with enough pinyin examples.
Rúguǒ yǒu rènhé gōngzuò pīnyīn yǔyīn héchéng (wénběn dào yǔyīn) yǐnqíng, jīhū suǒyǒu de rén huì zài yīqǐ, méiyǒu rènhé jiàoshī xuéxí duō yīdiǎn, jiǎshè yǒu zúgòu de pīnyīn fāxiàn rènhé yǒuyòng de lìzi, chū xuézhě de shūjí.
Thank you Mike, you are a great teacher!
Xièxiè nǐ, màikè, nǐ shì yīgè wěidà de lǎoshī! 
A few of the Pinyin explanations are strange, as if they were filtered through zhuyin fuhao (e.g., “u + eng = ong” in lesson 6). And it’s important to note that an initial plus a final is not necessarily a “word.”
But from glancing through the videos they look useful. Thanks for making them available.