If you want to know your pronunciation, I suggest getting a mirror so you can watch yourself.
For instance, to pronounce R, open your mouth, place your hands in front of your face and breathe out like you are wanting to waRm up your hands. R is waRm.
To pronounce L, place the tip of your tongue on the back of your top two center teeth. Suck air in and you’ll notice that the air feels coLd on your tongue. L is coLd.
That is how you pronounce L and R, for example.
In the word pull or full the u is short as in the words up, cup or nut. It’s a kind of “uh” sound.
In pool and fool the u sound is longer, like “oo” and you need to bring your lips together into a kind of o shape.
Watch the video
Hope this helps.
English pronunciation has a lot of variations, but keep listening carefully and don’t give up.
