|: I think roller skater terminology is:
: Grinding is done on the axles
: Sliding is done on the sliders
: Inline skaters don't have axles to grind on and they call all their sliding moves grinds. Pretty confusing.
Flat sliding bars+round coping are good, just have to do like skateboards and take care of you balance.
For both slide/grind and mixed first steps are may be (they were for me):
on small ramps/bowls (never liked fun boxes):
- without trying to slide/grind, just try to land knee bent a bit and stay in balance on the coping, then (turn?) and go down. Once you are a bit confident try to check the sliding by moving your feet a bit once you're on the coping.
- in order to learn the grinding/sliding trajectories, try to run large ellipse trajectories on the ramp, jumping , rolling and the platform, then droping in the ramp. As you get more confident get closer to the coping....
-As Robert told you also is good.
Feeling more confident you can combine the 3.....
For me the first learned grind/slide was one foot in slide, the other in grind (kind or king grind?), so I was 1/4 to drop in.