I'm a new PhD student and bioinformatics is all very new to me so apologies if this seems trivial. I have some paired-end RNA-seq data which I've managed to convert to sorted and indexed bam files however I'm confused to where I go from here, am I right in thinking I can now visualise this data and if so how?
You can use the Broad Institute's IGV to look at the data.
Follow the IGV user guide here. You need to select exactly the same genome (and its annotation) that you used for alignment of your data.