I did it. So far I've noticed a few things, for example you have to populate/federate the communities yourself, and it can take a long time. It took hours to retrieve and catch up all the lemmy.world posts. I expect it to be an ongoing thing. When you first connect to a community, it downloads the first 20 posts, but all the comments are empty.
The plus side though is it is very fast for me. And nobody can delete my profile.
You gotta remember, The blackout brought us refugees I don't think lemmy planned for this. I think the updates that are coming will address all of this. Reddit is decades old. Lemmy is new to all of us. We just gotta wait and eventually it will become second nature and we will be as good as Reddit