Hi and welcome to the forum
What fish you add will depend on your water chemistry, ie: general hardness (GH) & pH.
Do you know what the GH & pH of your water is?
I assume you will be doing a tropical tank?
How much light and what type of lighting did you have or did you plan on using?
Did you want to go over the top and add carbon dioxide (CO2), or just a simple planted tank?
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If you go simple planted tank you can use plants like Ambulia, Hygrophila polysperma & ruba, Ludwigia natans, Amazon Swordplants, Vallisneria (narrow is the best to try). These plants should all be planted in the substrate. If you want a floating plant you can try Ceratopteris thalictroides or the other species and it can either be planted or float on the surface.
You can then add a liquid plant fertiliser several times a week. Iron based fertilisers are the main type to use, and you should invest in an iron test kit to monitor the iron levels in the water. I use Sera Florena and the Sera Iron test kit, but you can use whatever is available to you.
You add x amount of fertiliser and then test the iron level each day or every few days and add more iron based fertiliser as required to maintain a steady level in the water. When you first start using fertilisers the plants will gorge themselves and you might need to top it up each day for the first few weeks. However, it should settle down and then you add some every few days or as it's required.
You can also add clay balls to the gravel for each plant. Find or buy some red clay, dry it out and crush it into a powder. Then mix a bit of clay and some water and roll it into a ball about 10mm diameter. Let the ball dry and then push it into the gravel under the plant, or push it in the gravel and put a plant on top of it.
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Have fluorescent or LED lights above the tank and run the lights for about 12 hours per day. If you get lots of algae on the glass, reduce the photo period by an hour and see how the algae goes. You want lights that have a 5500-6500K (K is for Kelvin) rating.
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If you want CO2, then you can get KH dosing pumps and other equipment but it gets expensive and I personally think there is ample CO2 in an aquarium due to the CO2 in the atmosphere, and in the water produced by the bacteria in the tank.
A CO2 system is not necessary for aquarium plants and is not something I bother with.