tutorial workflow issues

Hey, i was tring to set up some workflow from tutorial web(https://training.galaxyproject.org/) such as [https://training.galaxyproject.org/training-material/topics/transcriptomics/tutorials/srna/workflows/sRNA_seq_Step_1_Read_preprocessing_and_removal_of_artifacts.ga](url), i find out that many workflows had this issue that the input file type were datasets collection , can't map to the following tools which need datasets. And i can't change the input datatype on these tools. I can only change the datatype of the input data, which make the logic of workflow disorder.
In this example :
tool **Trim Galore** ' out put is dataset collection , and the downstream tool **HISAT2** input was datasets(did not find a way to change).

Open the linked sRNA-seq workflow and reproduce the connection between Trim Galore and HISAT2 in Galaxy. Inspect how the workflow declares the output collection and downstream input, then check related tutorial workflow files; done means the workflow connects compatible data types without requiring users to alter input types or disrupting its logic.

Written by the indexing model from the issue text.