Hi @Stewie_Griffin, welcome to the forum.
Regarding a music player:
You might find something useful in this thread concerning audio players
Or this custom Bric that is offered by a 3rd party developer
You could also use the aplayer or others via the HTML Bric , Div Bric , Page Settings + Add Code, etc.
Same goes for the Snipcart or other e-commerce, via the HTML Bric , Div Bric , Page Settings + Add Code for CSS & JS resources as needed based upon setup and usage instructions provided by whatever 3rd party libraries, plugins you wish to implement – like Installation – Snipcart Documentation
Regarding placement, start with the basic Structure Blocs, and use the class editor as needed also …
https://help.blocsapp.com/moving-elements/
https://help.blocsapp.com/category/design/