Language Question: Final Consonants t, k, etc.

Are final "stop consonants" (t, k) mostly silent in Thai:

ลูก = Lûu[k], คุก = Khú[k], etc.?

I'm trying to find the written rule.

Thanks very much in advance!

Has anyone had a good experience with learning Thai online? I'm still planning to take a class when I get to Thailand, but I'd like to get a head start. I have not been thrilled with my experience thus far. I have a bit of a hearing problem, that combined with the challenges of Thai (tone, alphabet, vowels swirling around the consonants...) have made me feel overwhelmed and not certain where to start. Any recommendations? I tried a one-on-one tutor who just read a bunch of random words and expected me to immediately be able to repeat them back. That was NOT helpful. lol. Memrise, my goto platform for language, has not tackled Thai.

Any suggestions?