Hello! Here is my bike. I have some questions



I need to do some work on it. I don't have the right allen wrench to adjust the handlebars. I want to put them lower and rotate them up a bit (basically, I want them to be parallel with back, if that makes sense). I also need to tilt the seat back some. If I adjust the handlebars like that, does that mean I have to have the cables retightened or whatever? Im a mechanical noob, so I might be way off..

Does anyone have suggestions for a good rack + fenders? For the rack, I would wanna put a basket on it so I could maybe stop by the farmer's market on saturday or something. Or even just carry my backpack in the basket.