Sera Florena is a good liquid iron based plant fertiliser.
You can get Laterite and make small balls out of it (about 10mm diameter). These can be dried and pushed into the gravel under plants.
Have a light on the tank and keep it on for about 12 hours per day. If you don't get any algae then you can increase it by a couple of hours. You can have the lights on for up to 16 hours per day. If you get lots of algae then decrease the photoperiod.
2 lights are usually better than one but it depends on how big the tank is.
Get light globes with a temperature or Kelvin (K) rating between 6,000K & 10,000K.
Some good plants to try include Ambulia, Hygrophilla sp, Elodia, Swordplants, Ludwigia & Vallis