As a beginner, it's beneficial to play junglers with straightforward mechanics. Champions like Warwick, Xin Zhao, or Amumu have simpler kits, allowing you to focus on learning the jungle role's nuances without getting overwhelmed.
Balance farming and ganking. You should not neglect either aspect of jungling, as both are important for your gold income, experience, and map pressure. You should farm your camps efficiently and avoid wasting time wandering around the map. You should also look for ganking opportunities and help your lanes get ahead or relieve pressure. You should also consider counter-ganking or invading the enemy jungle if you have the advantage or information.
Plan your pathing ahead of time. You should have a clear idea of where you want to start, which camps you want to clear, and which lanes you want to gank. You should also consider the enemy jungler’s pathing and try to predict where they will be. You can use wards, scuttle crabs, and pings to track their movements and alert your teammates. You should also adapt your pathing according to the game state, such as objectives, lane priority, and enemy vision.
Know your champion’s strengths and weaknesses. Different champions have different playstyles, clear speeds, gank potentials, and scaling. You should choose a champion that suits your team composition and the enemy team’s threats. For example, if your team lacks crowd control, you might want to pick a champion that can provide some, such as Sejuani or Zac. If the enemy team has a lot of squishy targets, you might want to pick a champion that can burst them down, such as Kha’Zix or Evelynn.