Ανδρομέδα

Hello,fellow English learners! Since my native language doesn't have silent letters it is sometimes hard to remember when to pronounce a letter in a word.Has anyone else encountered a similar hardship? Concrete examples include: - Talk; do you pronounce the L? - Herb; do you pronounce the H? -Wrist; do you pronounce the W? -Receipt; do you pronounce the P? P.S. Is it correct to say the L or just L?