Hi @JoanGalarza,
Great job looking at what was available and trying to pick the right types. You are very very close, however the axis (SampleData vs FeatureData) is wrong. You want to import as SampleData[Sequences] instead of FeatureData[Sequence].
The reason it’s SampleData[Sequences] instead of FeatureData[Sequence] is that we haven’t selected those reads as features (and counted them up) yet. You should be able to follow along with this tutorial which starts with seqs.fna, dereplicates, and then does OTU picking.
Hope that helps!