OYER as in “employer” is the OY sound followed by the neutral “uh”
OER as in “mower” which is OH plus the neutral vowel “uh”
AYER as in “slayer” which is AY plus the neutral “uh”
Consonant sounds are made in many different ways but many speakers go wrong because they do not use their voice when they should use their voice. Consonant sounds can be voiced - as in Z: “ZZZ” - you can hear my voice, can’t you? “ZZZ”.
Or consonant sounds can be unvoiced - as in S: “SSS” - you...