I’m not sure what you mean by this. There are (at least) three distinct ways to play GW2, each with their own endgame: PvE, PvP, and WvW. And of those, PvE is the most popular.
The PvE endgame does not start when you reach level 80. In some respects, level 80 is merely the end of an extended tutorial. That’s why there are so many ways to skip it. At this point you are ready to start the massive level 80 content, including both expansions and several zones in the original map. I mean, just look at the other players who are online with you. Very few are below level 80.
Also, reaching level 80 does not mean character progression is over. After you insta level your reaper to 80, they will not have any reaper traits or reaper skills. You have to earn those the old fashioned way, by killing stuff and completing quests. And you will probably be doing that in the expansion zones (which are great solo, btw).
After you have explored all the level 80 zones on all maps, completed all the story lines (including Living World), and obtained all your elite skills, then you are in the actual endgame. But that’s a ways off, and I think it’s premature to worry about it now.
The most common way to get level 80 gear is via the Trading Post. Sell what you don’t need and buy what you need.
If you don’t want to do that, you will need to grind for crafting materials and level your crafting skills. This is also the only way to get ascended gear.
Some items cannot be obtained on the TP and cannot be crafted. When you’ve scoured the wiki and realized that there is a very specific item you want that falls into this category, your laurels and coins will be waiting for you. If right now you aren’t at that point, then just let those things sit in your bank.