I would only try it at altitude. Flaps 30 are not approved for that in my airplane.
Practicing at altitude won't work. Different density, different viewpoints for the kind of precise control input that is needed to effect a take-off with full flaps.
First of all, flight manual procedure is not what we are talking about. Handling the airplane in an unintended take-off after touch down is what we are talking about, and I've never seen the subject mentioned in any POH. They list a go-around as if you are initiating on final with 1.3 Vso.
Unless you are really at full gross weight and at max DA, most of these little airplanes will lift off with full flaps, but won't climb much, but there is technique in safely raising the flaps.
Using a manual flap handle allows the pilot to gradually raise the flaps while accelerating and climbing. Effectively keeping the same angle of attack by adding elevator pressure while releasing flap handle pressure. You can feel the exchange of pressures, so it is easier to develop than with electric switches.
But it still can be done.
Momentarily flip the flap switch up while maintaining the same pitch, rest a second, flip it up again adding back pressure to maintain an attitude that is climbing and accelerating towards Vx. Hold Vx(or Vy) and continue to raise the flaps. It's called 'milking' and I'm sure you have heard of it.
Eventually, you will see that you can just hold the flap switch up continuously and add the elevator back pressure (angle of attack) that you are losing with the flap retraction.
It would be good to practice the rough procedure at altitude if you don't feel comfortable with a competent instructor, but you have to do it from the ground to get the experience of milking it if you really have to.