Randomname, you must be a very bad reader, and your advice is less than mine...
At least I go to say what it takes to get to a "higher" level of tennis.
You schedule your life. You can choose to work, to play, to study, to cruise, but it's up to you.
After your work priorities, give yourself some time for tennis, your choice how much, when, with whom, and whatevers.
If you decide work is more important than tennis, live with it.
If you decide tennis is more important than work, then go play tennis.
You schedule what you want, and it's out there for the taking.