Please help!

I `ve come across a one problem.I always say There are a lot of something without hesitation.But today this question became more interesting. Is it correct to say There are a lot or the correct phrase is There is a lot.because lot is singular.please explain.

HI, REC 1 how are you??
Here is how it works: If the noun that follows “a lot of” is plural, use “are a lot of…”
There are a lot of cars in the city.
If the noun that follows “a lot of” is singular, use “is a lot of…”
There is a lot of love in the room right now.

Try to use “many” or “much” in place of “a lot of”.

Nice to meet you.
JP

thank you very much.Your piece of advice is quite useful and comprehensible.