Ok, consider the reality of the matter: do you have the money to pay for cat food? Pet insurance? Any unforseen vet bills? Getting them spayed/neutered/shots etc? Toys/beds/litterbox and filling/other forms of entertainment or "housing" for them (cats need toys they can play with when you are not there or they get bored and cause a lot of problems)? Is it going to be a housecat or an outdoor cat? Are you prepared for the needs of each format?
Pets are a huge responsibility. Cats may be more independent and self-sufficient in some ways than dogs (and other pets), but you can't just get one and do nothing to take care of it, and you need money and time to do that. If you aren't read to take care of a (human) baby, a pet is usually a bad idea - "even" fish require a great deal of upkeep and continual care (I'd probably argue fish are actually harder than a lot of other options, but people seem to think they're easier and/or more disposable because they're less cute and fluffy and don't scream at you if they are in pain, even though they still can experience it).
I would suggest starting with a (non-hardy) houseplant and see how you get on with that, and if you can keep that alive for a year or so then maybe consider something in the animal kingdom...