The Sims 4 is very boring right now!

it is hard to help much when someone is bored simply because we are all not the same in how we play. I would agree that maybe you should check into a challenge as simgirl1010 suggested ...i just started a new save in Willow Creek and spent some time doing some add in lots ..a bowling alley...night club with dj.......restaurant....a day spa....and a outdoor public pool. My sim is single but since you like to play a teen you could have a family with your teen as the focus...i went to outdoor resort and set up the camp home a bit and added some things to the park. my single sim is just home from graduation from university and has a degree in botany. She spends her spring moving into a simple home and getting to know her neighbors but when summer comes she will go to a camp convention to further her studies with plants. She will meet someone who has funding for a trip into the jungle to study an upset in the Eco system that seems to be killing plants. Back home again, she finds out the person going on the jungle trip lives in Willow Creek.
so maybe you can do something like that ...do some set up in your town of choice and create a bit of a mystery to solve and see where that goes