Cereal or no cereal?

My son is almost 6 months and I’ll be starting him on solids soon. I’m debating on whether or not I’m going to give him rice cereal. If I do I plan on introducing it to him before actual baby food but when I’ve done research on it I just see a bunch of stuff about it being empty calories and hard for them to digest and some other negatives, but I know it gives them the iron they need, opinions please?