The basic overland is catered to a 'general audience', therefore is fairly simple point and click dead.I'd be very interested in hearing updates about your experiences and impressions. For me, the combat wasn't challenging enough to keep me interested past my initial excitement to explore. I'll still play it from time to time, though, when I'm in the mood for good rp stories with trivial combat.
If you'd like to try Maelstrom Arena in Wrothgar for a challenge or Vatesheron in the reach. they are solo arenas that are fun and challenging.
The 'real' challenge comes when a person begins to do dungeons. Normal mode? eh pretty easy. Vet mode eh very hard.
They do require 4 players though. This may not be to your liking but! If you give me your handle i can get you into my guild where i do not open recruit and only let in half polite generous people. Come join us! @shmity72 in eso and @shmity72#8905 for discord typing.