Here’s Lemmy Explorer, with communities sorted by number of subscribers.

You can check if communities similar to what you liked on Reddit have any subscribers, which many will not.

lemmyverse.net/communities?order=subscribers

Another tip is to add a zero to the end of the score to make it correlate to a similar Reddit score. So, fifty upvotes on Lemmy is about the same as 500 upvotes on Reddit.