hey guys jus a question, im trying to understand liquidity pools and all that. I wanted to know does every project need to have a liquidity pool in order to sustain itself? Is there initial liquidity bought in, how exactly does this all work. How do coins sustain themselves if there is no liquidity pool? Really confused on this topic if someone can please help explain. I see some projects burn the LP tokens after they launch, what exactly does that do? What does it mean when they put a percentage if the inital token supply in reserve, what does this accomplish?

Now that's a lot of questions.
New projects typically input the initial liquidity into the pool themselves and after that others can join as liquidity providers. But nobody forces you to use liquidity pools, you can also apply to get listed in centralized exchanges - or choose to not be available for trading at all.
Burning the LP tokens means that the tokens are either explicitly burned (if the token supports such functionality) or implicitly burned by moving them to an address to which nobody has access. This is done so that nobody can remove liquidity, and therefore nobody can rugpull the project (at least not in that way).

sorry for all the questions bro lol. So when they put the initial liquidity, that is money coming out of their own pocket correct, what does getting listed on a centralized exchange then do to the liquidity? And i still dont get what burning the LP tokens does, i feel like im missing something here, wouldn't burning them cause the price of the coin to be more volatile?

Burning the LP tokens is not related to the price of the actual pool tokens. It simply means that the liquidity can't be removed.
Centralized exchanges are just another way of trading assets, and they are not related to LPs in any way.

oh man i think im misunderstanding what burning is completely