Xur shows up very early Friday morning. Let us know how many strange coins you have by then and we'll let you know what to get.
Is there a strike playlist left for people that low level? If so, jump into that. Patrols will take you forever to level up and just keep appearing. I mean forever. Go see the bounty robot in the tower (just as you spawn in go up and to the left). Now, most of those bounties are simple (kill 50 fallen), so grab those and then do patrols at the same time (ignore the ones that are really time consuming).
Then combine that with public events (you may be a little low level to solo them but sometimes people are around). The earth and moon ones
http://destinypublicevents.com/original.html
You definitely can and should combine things like patrols, bounties and even quests where you can.
Overall I always have the most fun farming strikes with randoms.