Planted aquariums are great, its adds another layer to your tank.
Things you need to consider, how much you want to spend, high tech or low, style of planted tank, fish you wish to keep, substrate, lighting, filter, c02 or not, how much maintenance you want to do, species of plants you love or hate, and are you willing to research more then ever.
Once you have a general idea of what you want we can better help with other things.
A quality led setup is highly recommended, as it saves money in the end and doesn't create heat that is unwanted and looks great. I suggest finnex. Substrate can be tricky, I use safetsorb which is cheap clay substrate which work amazing for me.
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