It doesn't make much sense to not train your whole body, you might not realise it but at this point you almost certainly are weak and small all over and would look odd if you didn't at least train your back too. But your legs are a huge part of any real strength and having chicken legs with a good upper body would eventually look silly too.
People go to a gym because to train properly you do need quite a lot of equipment and it's a big investment. You might be thinking something more like at 50kg set with a little bar and DB handles? I started with that and honestly never achieved anything noticeable until I realised I needed to go to the gym. I wish I hadn't wasted that time. As a noob I'd want:
20kg bar
squat rack, with saftey rails, that goes low enough to to bench from
bench
120kg of weights- maybe bit less if a woman but either way need to add more within months
rubber mats to protect flooring