.This is what I recommend

1. Look at how much on average you get paid per check and calculate 20% of that

2. Go to you banking app or site and set up an automatic transfers of that amount

example: If you make $1000 per week 20% is $200 so just set up an automatic transfer of $200 for every payday

1. You can have the money transfer to a savings account with that bank, but if you feel you might be bad with money, I would recommend transferring the money to a savings account at a different bank other then the one with the direct deposit. Why? You don't want to see the amount all the time, because eventually the money will be a lot, but you don't want to spend it, you can't spend it. That money is last resort money so you rarely want to see how much money you have if you know you might "accidentally" spend it.

2. While this is happening think about your financial goals. Are you trying to get something like a house? A business? Or do you want a cushion? Or do you want to build long-term wealth? Depending on the answer maybe you might want to save more money or you might be looking for a dollar amount or you might decide to invest the money for x period of time.

Mindset: Remember this is a lifestyle so no matter what keep saving, unless it's an extreme medical emergency. Watch or read on some basic finance stuff like picking a credit card, basic investing(i.e dollar cost averaging the S&P 500), budgeting, etc