comfort and confidence are the name of the game. If you having trouble riding switch, BUT you can do 180's, throw 180's everywhere. land switch ride it out a turn, or revert both fronside and backside.
Even if your not confident riding switch, if you get really good at landing switch, getting out of switch every way possible, and 180 everywhere(getting comfortable getting in and out of), you are naturally building up you switch skills.
also something you can try is flat 180's, 360's, and 540's. The idea here is as you flat spin, you exit the rotation either your regular stance or switch. as you spin 3's and up, it starts to feel very much the same exiting both directions. You have just smashed through the confidence barrier.
Bookin it down a chutes and steeps switch simply takes miles, just as it did as you progressed from the bunny slope to the big hill. but the more comfortable you can get being ambidextrous on a board the better.
As a ender, I always tell my begginers that wanna get into more stuff, if you can 180, youll naturally learn to ride switch, and vice versa, if you can ride switch, spins are ride there. they go hand in hand.