First grow, Sweet ZZ RQS

This is my first time ever attempting to grow my own cannabis. I am currently one week in and have already faced my fair share of set-up frustration. I am using a lumatek attis 200w led light in a secret jardin DS60 tent (60x60). I choose this tent for the fact it can be customised to place inlets and outlets wherever the user wishes and its size fitted perfectly in my closest. I did a test run of my set-up, with light and extractor fan on full power and was quickly introduced to negative pressure. I didn't want to leave tent door open to counteract this so ordered extra passive air inlet vent, that delayed my start by a week but fixed/balanced this issue. The grow tent heat is higher than I expected being led. But I assume this is from being in a closet and I'm currently working on a way to pull cooler air into my closet/room while in turn venting air away from being recycled back into the tent. Seed germination was quick and broke soil the day after planting. Seedling took off at first even felt it was stretching a bit. I have kept my light at 35cm but changed intensity as seed matured. The heat issue as mentioned before has caused me to run my extractor fan at higher speed which in turn I believe has affected my humidity (30%). As an effort to try and fix the humidity, i placed half a plastic bottle over the plant an sprayed with water, hoping to cause a greenhouse effect. A few days later my plant is doing really well despite humidity and growing healthy.