How do I integrate metabolic and microbiome data?

Question

[Priyal]

Hello! I'm performing data integration for a research project. I have the sample's gene expression data, the sample, and the source of the sample. I got all of this from GEO and did not collect anything myself. Next, I need to integrate metabolomic and microbiome data for my studies into the same dataset. I searched through the research paper that is the basis of my previous dataset and they used kraken2 for microbial identification.

I'm very very new to this field, this is my first project.

How do I integrate the microbiome and metabolomic data into my dataset? I cannot install kraken2 on my macOS.