I literally skipped the Lulu event when I started as I was just wasting energy for it. I focused on leveling up and I was able to complete the next event which was the Aaria event. You should probably skip for now as it costs 5 energy to do the easiest one and it's not a good investment for newbies.
i agree, i started 28 days ago and was not able to perform well on Aaria event until i rushed the heroes and equipment, managed to complete only 50%
but now i am more prepared for this halloween event, but i only wish that the 2 gacha quests are not so bad
i heard someone spending 30k pumpkins and still have clear those gacha quests....