So I picked up a 1970 Duster today, got some newb questions

You're at the right place to get any and all questions answered. Don't be embarassed of your lack of knowledge on these cars. We were all in kindergarten at one time ourselves. The bulbs are in little black sockets that have little nubs on either side. They twist in and out. The nubs break do to age. You may not have any bulbs in there. You can get replacement sockets from year one or go to the bone yard. They used them in 80's trucks. Hope I helped.