Playing as a plant is planned, however, won’t probably be prioritized by the devs, so it might come later than other things. Plants won’t be able to form civilizations, however, that doesn’t stop you from playing as one. Also, these smaller questions are probably better for Quick Question Thread. And also, there was a lot of topics covered already on this forum, so I suggest going through some of them and seeing all the things that have been proposed or asked already. It’s a bit messy, but one gets used to it. Welcome to the forums!
Also, if would be struggling with anything, feel free to ask in the Quick Question Thread or in the shoutbox (that button in the bottom right corner), we’ll be glad to help! One more time, welcome!