I just recently took up cross stitching. You can learn all the basics for free on YouTube and there are tons of cross stitching communities online and there are tons of free patterns online too. All the supplies you need at first are some thread, some Aida cloth and needles. When I started I got a stitching hoop too I think my total investment was about $20.
I’m working on some new pieces now so hopefully I’ll have something else to post soon!