Spending

It's fine to spend money on yourself once in a while. But always spend within your means.

Set aside a small amount of money for pampering yourself every month.

If you spend on something that improves yourself, you are effectively "investing" in yourself.

Track your spending. Using tools like a notion database, or a spreadsheet, record the amount you spend on necessities.

It is important to know where your money is going, so that you can calculate how much you can spend or save.

"Cheap" entertainment

Gaming

Don't spend on mobile games, gacha games, free to play games. They don't last long. While you may need to spend quite a bit on a good computer to get a good gaming experience, it's a worthwhile investment. You can also use the computer for work or creative stuff.

I personally subscribe to MMOs. It helped me save a lot of money in the long run, make new friends from all over the world.

Video Streaming Services

Also another source of cheap entertainment. For a monthly fee, you can watch a lot of movies and TV shows.

Or you can just watch YouTube. Preferably educational content. There's probably a youtube video for something you want to learn or know about.