In Los Angeles Delta operates out of terminals 2 and 3. I would use the Delta application or search online to verify which gate you're departure is out of. Any gates with a 20 are departing out of terminal 2 in any gates with a 30 will be out of terminal 3. Both of them two and three have security and luggage check-in spotsrespective to each terminal. I would recommend checking in and going through security at your respective departure terminal. I would start to check in process on the second level which is departures regardless of which terminal you are departing out of. There is a lot of construction so Don't be surprised if you see lots of equipment everywhere. You don't really need a map for each term alone as terminal 3 is basically an donut circle with a food court in the middle and terminal 2 is just a strip with no turns. If you need to get between terminals there is a bus that can shuttle you back and forth.
https://www.flylax.com/en/lax-terminal-maps
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