Good morning, everyone!
I started playing poker in 2018, and in my opinion, it is incredibly important for beginners to study hard and practice. There is no such thing as an "easier" or "harder" site because it completely depends on the individual player. Some players simply find it easier to win on a specific platform.
For example, I know excellent players—including coaches for poker stables—who have highly winning graphs on PokerStars but lose money on GGPoker. It varies from player to player, as you have to adapt to the software and the field. Personally, I find it much easier to win on WPT Global, while I struggle to win on ACR.
The best approach is to play on several different sites to find out which platform is the most profitable for you.