Well.. A real skater wouldn't wear skirts. But if it's black and obviously a skater shirt I would wear a Jamaican colored shirt or tie dyed shirt.
You should definitely do the graphic muscle tee You can find them on these websites www.shopwilddaisy.com www.forever21.com www.nastygal.com www.fresh-tops.com
www.fresh-tops.com
There are lots. i have given the link. Go thru it.
Check out the below image you will get an idea which kinda shirt you can perfectly match with your skater skirt.
I think skater skirts are really cute. If your wearing your as high waisted ( up/ passed your belly button) then wear a crop top with it. ( a shirt that is higher that your lower belly and/or belly button) Not just any crop top bc there are plenty. Like the long sleeve crop tops or t shirt crops If your just wonder what wouldn't go well with it well I'd say any shirt is cute, I say tuck it in, sometimes it looks really weird tucked out. This pic is cute with a crop top.
try something not to long an baggy... should b ok with most colors an styles