A lot depends on how experienced you are with plants/planted tanks.
If you dont have much experience I would suggest going with low tech because that will help you learn a number of things from scratch. Unless one really learns this stuff well & has patience it can turn into a disaster.
Here's an option/suggestion which will give you a gradual setup and a chance to learn as you go, its something thats worked for me:
one aim of having plants is that they should reduce your cleaning work IMO, they should consume fish waste. of course filtration also helps with that.
at the outstart, plant so that approx 30% of the floor of your tank will have plant roots, all on one side of the tank. remember you are conducting an experiment. you will need to keep doing your regular cleanups/vacs in the areas that dont have plant roots for the time being. also lighting will be required to be concentrated only on the side where the plants are. for the time being you can have lower/no lighting in the rest of the tank, depending on your setup.
substrate can be as simple as 3-5 mm gravel like i use. keep it 2.5 inch tall. plant a lot of simple plants with "low requirements". the ones that work for me are: cabomba, wisteria and ozelot sword.
focus on getting this setup going good, give it 2 months. if things go well you will see new growth off these plants which you can cut and replant and thereby grow the floor area coverage. this is something thats worked for me. you can gradually decide how much you want to increase the planted floor area coverage.
my plants are showing growth and results in 1.5 months and in 1 more month i should have 1 more cabomba mini farm in a new area in my tank from cuttings
. Downside: I have to keep away from fancy, high requirement plants.
I infrequently dose liquid ferts, but want to get more regular with that. I dosed a co2 tab which my LFS suggested but I want to keep away from co2.
I have seen a 20g tank using this technique with almost 100% floor coverage and it requires very low maintenance. See if you want to go with it or you can customize some of the principles.
my lighting is: 1.5 WPG 6500K + lots of daylight (no direct sunlight)
Hope this helps.