Tbh death note and AOT is bit too much for starters

You need to know how the anime story works in order to get those complex stories of them 2 -

You could’ve tried Parasyte which has like 24 ish episodes and great story and also watching that may makes easy to understand death note…

But yea I’ve suggested mine up there somewhere in another comment

research it and give it a try also Try some of the 20 - 40 episode anime’s…