Both stores actually have instructions but you need to PURCHASE the product in order to get them. I'm sure no Manufacturer is going to sell you their product and say, basically, that you're on your own.
Home Depot sells Ashland-Davis siding. I KNOW a book full of instructions can be 'had'. As an aside, you have to be aware that all siding isn't the same. So, depending on who you buy from AND what 'style' you choose, the instructions could vary enough to throw an amature. You MAY find a video through the mfgrs. but you can search sites like Amazon.com under their Videos.
For written and/or Adobe format instructions, check out my references in an old Follow-up of mine. (Please heed the 'light advice' therein.) Vinyl Siding. My best to ya and hope this helps.