Playing too passive

So I've (re)started playing league about 6 months ago and I've sort of been losing a lot, and judging by my teammates' comments, the main reason for that is that I play "too passive". I'm normally a midlane main but I've started playing a lot of jungle lately - now I constantly get the complaint that I don't gank enough. This isn't necessarily due to bad clear routes or time management - I COULD gank a lot, but I always say it's too risky and whenever I gank, I'm scared of the enemy just turning and killing me (because I see that happen a lot). So I wanted to ask if there's any particular roles or champions that are recommendable for this kind of playstyle.
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