What you can do is read a lot about different systems. But the question you have to ask yourself is how you want to make money from gambling. Do you really want to gamble properly and earn money purely on the basis of information and systems? Or do you want to go more into the gray area and keep yourself busy with things like arbitrage betting and relevant matters. And then of course I'm not even talking about matxhfixing. In principle, there is no watertight system that guarantees to always win money, those things do not exist, even though thousands of books have already been written about the casino.
You could also reduce the luck factor quite a bit by engaging yourself in poker and not just gambling on sports and in a casino. The luck factor is also always present in poker, but you yourself influence the percentage of luck that is present in certain hands. With good play you can still lose a lot of money and you can run into bad beats. But a good poker player who plays well will always play poker profitably in the long run, which is why the big names are always on the right side of the score in poker. I have little faith in becoming a gambling professional in a casino or in the sports industry.