The best way to dip your toes is to hire a guide. You will need a backcountry setup (skis/splitboard, touring bindings and boots, and skins), and often you can rent that from the guiding service, or maybe borrow from a friend. You will also need a backpack, beacon, shovel, and probe, which can also be rented or borrowed. This is a great introduction into the backcountry while ensuring peace of mind. Your guide has the proper knowledge to keep you safe.
It is highly recommended that everybody who wants to backcountry ski should take an avalanche course in order to truly understand the complexities of backcountry and best practices. An avalanche course will teach you the following crucial information for safe backcountry travel.
This goes without saying, but the people you head into the backcountry with should have the proper knowledge listed above, same as you. For beginning backcountry skiers, you should also make sure to head out with people who have even more knowledge than you. Their experience is invaluable in helping you understand their decision-making, what they see in the snow and weather, etc. Ask lots of questions—“What did you feel when you just tested the snow with your pole?” and “What does that tell you about the snowpack?”—and absorb as much information as possible.