Hi, unfortunately the ar620 is a "sport" receiver, meaning it directly controls the servos without any sort of stabilisation or SAFE. If you want SAFE you'd have to get something like an AR630 (which is more expensive of course)
i presume you are learning to fly, so I would like to point out that it is possible to learn without SAFE (although perhaps the simple scout in your profile picture is not the best plane for this). Either way I think you have to accept that your first plane will get a bit dirty and crumpled by the time you can fly well.
Also, if you do go the SAFE route, I would caution against using beginner mode for longer than necessary, as you might end up never learning to fly without SAFE.