No, don't go to valheim map generator page. You can do it without cheating.
Do something useful while exploring. Bring portal materials and set portals around the world for later use. For example, leave portals near big swamp areas, huge mountains, maybe plains too. Just find a safe location nearby, drop a portal, name it, mark it on the map and continue. I will be useful later.

or...

...if you want, you can share your seed here and we will look it up for you and give you some hints.