Replying to Bad 1st longboard experiences

the other day my board came never ridden a board before... so i cruise around my neightborhood for a couple days the head up to this mellow hill me and my friends have been looking at. take my first run fine just some nice carving  hike back up a little farther this time and head down about 1/2 way down i get crazy speed wobbles at about 20-25 the road is coming into a turn around circle and i gotta bail i get off and try to run it out but end up doing somewhat of a baseball slide on my right side   pretty bad road rash on my whole leg

so i wana hear everyone elses 1st longboarding experiences