How can you learn characters without p*ssing people off?

(TL;DR: I don't know how learn new characters aside from playing against bots, people get super toxic if you try new ones in normals. What do I do.) I'm fairly new to league (lvl 33), I use Blitz for runes and whatever and I know most of the easy characters for each lane. I want to branch out to different characters such as Jayce so I practice them against bots, but literally every time I go into a game with a new character everyone get's super toxic over tiny things that you haven't learned yet. I might sound stupid to people when I say this but I have no clue on how to learn every aspect of a character aside from playing it and looking up things online, is that the only way to learn? or am I stuck with people being toxic until I master that character?
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