Most consonants are unaspirated and there are various rules to pronounciation. The letter 'h' is always silent and is treated like a vowel when using articles and classifiers. In the French language, accent markings are used to indicate pronounciation of vowels, and sometimes to differentiate between homonyms. The letter 'g' when followed by 'e' and 'i' is pronounced as the French 'j' which is like the s in plea s ure. The French vowels without the accent marks are pronounced as nasal vowels most of the time.
Some exceptions do occur.
To pronounce the French u, try pronouncing an 'e' or 'ea' with your lips in the position when you are pronouncing an 'oo'. Pleased to meet you. I'd like breakfast.