Haha, hard to say if you are genuinely asking or if you are just shitting on good players 😄 I think if you dedicate yourself you can get really good in a couple years max, and keep growing from there. Nowadays there are very nice aimtraimers on steam like Kovaaks where you can develop a fantastic aim without even booting up ET as long as you keep the same sensitivity between both games. There have been some ET players that are quite excellent at these kinds of games like you can see here:
Of course, ET is about much more than just aim, the rest you learn by playing and gaining experience. If you wanna go the oldschool way and learn to get better in ET like most of us did, as trainers like Kovaaks weren't around yet, there are many ways to go about this. Try to find a sensitivity that suits you and stick to it. Preferably a lower sensitivity rather than a high one but in the end it is a lot about personal preference. There's a very important thing in any first person shooter which is muscle memory. Muscle memory is basically your brain unconsciously knowing how much to move your mouse in a certain direction to move from its starting position to the head of the enemy. If you keep changing your mouse settings you will never develop this and it will only hold you back
Aside from that, I would recommend sticking to playing medic for a while. On some maps maybe you will get much more kills playing field ops and throwing air strikes but that's not practice. To practice you will actually have to focus on playing Thompson/mp40 😛 (for anyone reading, please don't hate me for creating rambo medics).
Oh wait, this topic was about jobs. As for myself, I've been working in data science and analysis for a while now, while also dabbling my feet in leading lean and continuous improvement projects. If you ever need any help with that let me know hahaha