You can access instructional how-to books through O'Reilly Online Learning - a database that features books related to design, multimedia, software engineering, web development, and more. Search by keyword, or browse through all of the available texts related to things like Adobe Design Tools.
You have free access as a Langara student. Some public libraries in the lower mainland have access or are trialing access to O'Reilly books (such as Vancouver Public Library) and so you may be able to access it beyond your time at Langara.
You can access instructional how-to videos through LinkedIn Learning - an online platform that has training on a broad range of subjects including business, design, web development, and more.
Similar to O'Reilly Books, you have free access to these as a Langara student and most public libraries in the lower mainland (such as Vancouver Public Library) offer access to LinkedIn Learning too so you can continue to use it even beyond Langara!
You can also search the library catalogue for how-to books. Search by keyword or check out one of the books below: