The dimensions are a standard 50-gallon (200 liter) tank. This is not too small certainly. The lighting will be your first issue. When deciding that, you need to know what sort of "planted" tank you are intending--the low tech or natural, with nutrients primarily supplied by the fish (organics) with some supplementation by fertilizer, all the way up to the high tech with intense lighting, CO2 diffusion, and daily fertilization. The light drives plant photosynthesis, both the intenbsity and spectrum are important.
Larger tanks tend to naturally be more biologically stable so this is a benefit. And you can fit more fish in!
Which brings me to water parameters...something you will want to know before any decisions are made, though fish have much greater sensitivity to these than plants. The GH (general or total hardness) and pH of your source (tap) water.