First timer winging it is where everyone starts.From here it gets better with each harvest!
Re plastic wrapped pots it is not really a good idea. Roots getting too much light is more of a DWC thing where you want to discourage root rot but it isn’t really the same in other grow mediums. Air pots are quite popular - they look like they are made out of plastic egg carton material with holes at every juncture (bottom and sides) to introduce oxygen and allow better drainage and evaporation from all sides. It also does something called oxygen pruning which you can google if you want to know more. It is a bit like a screen door, so light is not a problem (and the dirt is protecting the roots anyways). Plant roots need oxygen and they generally get it from water, which is why you need good drainage, so it makes way for fresh water periodically and the plant doesn’t sit in old de-oxygenated water and drown. Having too much heat on the roots is also a problem that can be created with dark plastic on the pot.
Re using seeds from previous plants - just be watchful of whether they turn out female or male. The mother may have been from a feminized seed but if all of the other plants were female as well the seeds likely came from one of them going hermie and self-pollinating so the resulting seeds can produce male plants (having planted seeds from self pollinated feminized mothers I can attest that they can produce male offspring).
Good luck and enjoy the new tent. Have you invested in a grow light for your tent and a ventilation fan? Also, you should pick up something to test the pH of your water and larger pots - I like cloth pots and air pots myself, usually around 8 gallon size for indoors. On the GWE site you will find shopping lists if you aren’t sure. They say this hobby is a cheap way to get bud but it doesn’t always feel that way when we are out buying gear and new growing related toys 🙂