Can I create a magazine exclusively using PhotoShop?
YES you can, BUT this is not the industry standard and it is highly frowned upon. See last paragraph.
It should simply be a case of using CMYK and an adequately high
The standard is 300dpi for print, but again, that depends on the medium, quality, detail and output desired.
InDesign is pretty alien to me though I've read that it's better for
managing large amounts of text.
InDesign is currently the standard because it is simply an Adobe product and works well with Illustrator and Photoshop. Some shops still use good ole Quark but its usually there as a reference to people still stuck in the old times or for old file reference.
Request for additional context:
Any links to resources on this manner would be appreciated (e.g. good
websites for learning/templates).
Adobe does a TV channel known as AdobeTV and they have their own magazine with tutorials online known as Layers Magazine
Now that I've answered your question please note I cannot stress enough how bad of an idea it is to use Photoshop for designing print and these are several points why:
- File delivery will be nearly impossible unless in PDF format.
- Editing is in possible because your file size will be huge, Id estimate around 3-5gb.
- Some print shops I know of will not print your design because plates are horrible when created and this is because the designs are not vector based.
I will add more when I have free time.