Every single person who exercises at some point or other will convince themselves that they are different, that the normal rules do not apply to them. That they have the wrong genes, or the right genes, or that as a female they will gain arms like the Hulks if they lift more than 3kg, or that the only way they can bench big weights is to bench 3 times a week every week. STOP. Until you can prove you are different then you are no different to every other human on the planet and the rules of training apply to you. So follow the rules for at least 6 months, perhaps longer, train properly and then and only then re-asses, ideally with the help of a Personal Trainer, and only then may you change the rules.
Making improvements in the gym is achievable by us all and for those without genuine medical issues you will be amazed what you can achieve and how quickly you can achieve your goals.