There are basically two ways to intentionally make sparkling wine. You can bottle slightly early or bottle and prime using the Methode Champenoise to get a secondary bottle fermentation. You MUST use proper Champagne bottles with over-sized crown caps or wired in corks or stoppers. The bottles are stored upside down, then you freeze the plug of sediment which forms in the neck, pop the cork (still upside down), eject the sediment, turn the bottle the right way up and re-cork. That's called disgorgement.
Or, you can cheat.
I've tried disgorging, it can be very messy and quite wasteful when you get it wrong.
I cheat and force carbonate mine in a Cornelius keg.