In my opinion the best champs to play when starting out is Annie or Garen, because their kits are very simple and easy to learn and once you learn the champion you can focus on macro, which is like game sense and game knowledge. So imo pick the easiest champ to learn game sense which you can take with any champ you wanna learn later. For example, even if you can't play a champ like a mechanical god, you can still play the game at a higher level because of your knowledge.
Maybe you will think that this is strange but honestly when I started playing Lol some years ago, i was playing only ryze. When after some time i've discovered the incredible power of this champ, i used it to reach gold 1 without any problem
Annie is a pretty good champion to pick up when you're new to the game, she's got a lot of damage and crow control in her kit and is able to win a game all by herself. +She's fairly easy to play.
If you're looking to play jungle play YI, Top i'd say is easier for new players cause they're tank champs most of the time.. Just have fun with the game dude! I'd say Go Top and help your team.