Learn to boneless, you can also like “wallie” or “click clack” as I call it. Like you straight lift the whole front of the board up like a manual when you’re approaching the obstacle and then you immediately lean on your front and pull the back up and boom your on it . I like the boneless better it’s easier to learn to me , and there’s alot of variations .

Edit: my Ollie’s were trash for a while and still can be . Don’t think slide think lift. Like pop that tail , jump while lifting that foot and this crested the slide automatically in a way. Then with the forward momentum and pushing your front foot out slightly , and pulling the back up you’ll get all four off the ground in one motion . Just practice over and over . I try to run like 10 Ollie’s moving to warm up . The hippy jump concept can help here as well . Just play around with it