Welcome @Rambha_Jha
To map from the study identifier PRJNA1096305 to the fastq SRX accession identifiers, and get the data organized with nice sample labels, please see this tutorial. → Hands-on: Rule Based Uploader / Rule Based Uploader / Using Galaxy and Managing your Data
You’ll be starting with a query like this one (first step in the tutorial). → https://www.ebi.ac.uk/ena/browser/text-search?query=PRJNA1096305
This will get all samples into your history! Be sure to first toggle to use the extended 1 TB storage to place the raw reads into, as this will ensure your 250 GB permanent storage can be reserved for your results. → How to access your Self Serve extended data storage at UseGalaxy servers! - #2 by jennaj
Once your storage is set up, and your reads are in collection folders in a history, consider exploring our Single Cell RNA-seq tutorials and workflows! Any can be imported and customized.
Hope this helps to get you started! 