Following others: definitely do not think of avocados as fruit, it’s closer to carrots (has some sweetness, but wouldn’t put it in a fruit salad).

Great easy combos I haven’t seen suggested yet: with bread and feta/salty cheese, with salt pepper and mayonnaise, with oil vinegar and mustard.

I haven’t ever had cooked avocado.

I guess I’m in the minority here, because I quite like avocados on their own. Getting a good one changes everything and getting it at perfect ripeness is important and impacts taste too. If it feels hard, it’s too early. It should have a little bit of give when you squeeze it lightly. If it has black or dark spots inside it’s starting to go. If it has air pockets inside and/or mold you lost your shot - you can still cut off those parts and eat the rest but it will not be at peak tastiness.