Best one I've seen in Northern VA
1) at Lake Fairfax park in Reston, VA
https://www.fairfaxcounty.gov/parks/lake-fairfax/skate-park
2) at Pawhattan Springs in Arlington, VA
https://parks.arlingtonva.us/locations/powhatan-springs-skatepark/
3) at Wakefield Park in Springfield, VA
https://www.fairfaxcounty.gov/parks/wakefield-skate-park
4) at Van Dyke Park in Fairfax, VA
https://www.fairfaxva.gov/Home/Components/FacilityDirectory/FacilityDirectory/118/1337
Not familiar with DC or MD
Get a summer job their or teach or take classes. Good luck.