To become financially independent your savings need to generate enough money to pay for your monthly expenses. But what is "enough"? How can you tell how much money you need to save in order to become financially independent? How do you calculate something like that? This, of course, differs from person to person. What level of comfort do you need or want? How much money do you need on a yearly basis to sustain your preferred way of living? I can't really answer that, that's up to you! But to give you an idea, if you want to be on the absolute safe side think about the 4% rule*.
When you search the internet for a definition of frugality most say it means "the quality of being frugal, sparing, thrifty, prudent or economical in the consumption of consumable resources such as food, time or money, and avoiding waste, lavishness or extravagance". For me frugality stands for freedom and independence. A more down to earth way of explaining frugality is "to create or fix things yourself, don't waste anything and do not buy any stupid crap you don't really want or need".
I always had a pretty normal and standard life. As a teenager I rode mopeds, I had friends and I went to school to create a more secure future for myself. After school I went to college to study Applied Mathematics, I moved out and indulged myself in the fun and exciting life of college. During high school I worked at a supermarket re-stocking the shelves. I didn't earn much, but it was enough to pay for clothing and drinks on the weekends. It also relieved some of my mother's monetary stress, since we didn't have a lot of money. Our furniture mainly consisted of old discarded giveaways.