Replying to 360 In The Park?

I'm been trying really hard to get 360s and I can get them sometimes in my backyard(if not I get really close) to flat but I don't have much speed. I want to try it in the terrain park now but is it any different than landing on flat? The jump I'm planing on trying it on is about 3 1/2 feet in height and 13ish feet to the knuckle is this a decent sized jump I should try it on? Should I first try landing some 360's off of some side booters if I can find any or off the hip? I could also maybe build a jump on the hill near me and practice there with more speed but it would take me awhile to pack the snow :/I did search bar this and couldn't find any like mine sorry if it is a repost though.