There are folks on the board that are professional players with track records in the threads here on this page so you should ask them anything you may want to know. I've seen some posts of folks that claim to grind for a living and don't make a lot but they're happy doing it so they might help.
I've discussed this before and would stress that you can have a normal job/career, come home after work, go to sleep for like 2-3 hours, wake up, have dinner, hit the gym for an hour or so and still play for a few hours online or at the casino at night. Its much, much harder if you have a family or commitments though. A steady job even if its low paying but with benefits and a retirement is way more reliable than playing poker for most folks.
Even if you're an old timer that wants a career change I would suggest going to community college or a trade school (sorry I don't know the equivalence to those in
finland?, lol) but I'm sure you folks have something to retrain folks and go that route because the poker life style can be hard and your bank, the credit card companies or anyone you owe money to don't care if you're on a bad streak.
And whether you login or show up to the casino, YOU WILL HAVE TO SHOW UP AND PLAY just like a regular job but you can't skate through the day either because you will lose money. And you can't call in sick because you have bills that need to be paid regardless and you can't let tilt bother you or come up with excuses for not playing when you don't want to because again, the folks you owe money to don't care.
And these games when you're trying to play professionally aren't just about showing up and playing, you have to sit down and read, watch videos, study, get workbooks and poker software to help you study the game. When its all over you're going to have the equivalence of a Masters degree with all the hours and work put in!!!
That notion that you can just show up to the table and win is silly. Its going to be hard work. And a lot of folks aren't going to put in the time and effort or they find out what its all about and realize there are easier ways to make money in this world. So its up to you to figure out your talents and preferences are and commit but I know from experience that its not going to be easy or fun and even if you are a winning player then again, you may detest sitting in a chair all day worrying about paying bills while there are easier ways to make money.
I always tell people to try it part time and on the side then add more poker responsibilities like studying more or increase your poker hours but do it gradually. And before you even consider this you should know if you're a winning player at a certain level and have a place or a someone that knows the game you're playing well enough to give feedback on the quality of your play so you get better and help get you out of bad streaks.
So you'll need to find that connection whether online, at the casino, a poker coach or a network of folks you think are better than you that can help you.
Its going to be really, really involved is my point, lol. Its not going to be as simple as you enjoy playing on PStars or whatever site you play on and want to be able to do that 24/7, lol.
This all might sound dreadful, lol, but the truth is, if you can commit, study, have discipline and consistency in something then you can do almost anything but it helps a great deal if you know the steps to getting what you want and who to ask for advice while you're moving up the ranks is my point and having a support group of not just friends and family but folks that can also specifically help you along the way will make the journey easier. This stuff is what a lot of folks don't get and spend a lot of money and time doing things they find out they don't like after reaching their goals. So spend more time researching the lifestyle and what you're signing up for before committing!!!
Either way, good luck on your journey and I hope you do it gradually.