The decision really comes down to what you actually want to accomplish. If you find that the plane is floating past you and just won't come down, flaps will add some drag to help it bleed off airspeed. But they won't actually lower your landing speed all that much. I refurbished a Hangar 9 Cub a few years ago and decided to add flaps to make it a Super Cub. I found that actual landing speed was about the same (still slow) but the plane was more draggy. Others have commented that the Avistar Elite's flaps have about the same effect. So flaps will shorten your landing approaches, might shorten your takeoffs, but they aren't going to make your plane easier to land.
What they will do for a beginner is cause stalls to develop sooner and get worse faster. I would never recommend a beginning pilot fly a plane with flaps for that reason- the plane becomes less forgiving of bad speed management or a bad approach on landings.
I'll also ask you to rethink your goal of slowing the landings. The more slowly the plane lands, the more susceptible to wind gusts and turbulence it becomes. Again, in my Cub example, there are some days that I really have to be on the sticks while landing because it reacts to every little disturbance. Compare that to my Sweetater pattern plane that has probably double the landing speed (still not overly fast) and it's a joy to land.
So what's actually the issue? Are you finding it hard to flare for landing as the plane dives for the runway? That's a symptom of a nose heavy plane. Or is it just that you have control but find things happening too fast for you to keep up? That's just a matter of experience.