Wikipedia is about links - internal links and external links.
WP:LINKS; internal links: not to little, not to much; external links: always in a separate section at the bottom (or in references).
Work through the
tutorial, or get some practice in your own sandbox, to get used to the elementary syntax. And often look at other pages, to see how experienced Wikipedians have done things.
Some details
Make a list of pages that you find useful; on your user page or a subpage. For instance: try to make a link to this page (then it's no longer a poor little orphan). You can also make a short list of pages that are related to your field of study. Make a list of useful literature.