OKAY BIG UPDATE TIME
foremost I wanted to thank everyone who gave their tips so far, shared their knowledge and made this thread a nice place for people who actually had, or will have, the same issue as I did before.
I've been living alone for a few months already, and I can say that the most important thing I noticed was that you really can do whatever when you're alone, and that's both a good thing and a bad thing. So my first tip, from my experience, is to set some boundaries for yourself.
I've counted how much I spent the first two months, and just categorised my spendings, ranging from the "real needs" to "wants". It was great, I actually saved a lot of money. I'm still frugal, but it's easy to lose count of your spendings if you don't calculate how much you can spend weekly/daily.
Habits are pretty important too. I already started living alone with a habit to do my bed, brush my teeth and set the kettle for some tea/coffee as soon as I wake up, so it came easy to get used to doing more things as a habit. You know, sorting your trash, washing your dishes as soon as you eat, the basics. They are basic as hell but I did have a few times (especially during finals) when I left the dishes for 2-3 days, and even if I soaked them and all, it was just stockpiling trash. So as long as you get the habit to do things when needed, and not leave things for later, then you're good.
One awesome tip my friend gave me, is to give yourself 15 minutes to take care of your flat every day, and focus on the less obvious things. For example wiping down the dust from shelves, sorting your wardrobe etc.
It may seem irrelevant, because you can dedicate 2h every week to clean the whole house, but it's way easier if you're consistent.
Another thing I've been very passionate about is saving money, just taking out x% out of my budget, because I always end up with at least 10% of my budget left, but putting more boundaries can sometimes feel a bit more rewarding, especially if you feel really lazy and decide to spend money and eat out (I spent way too much during finals because I was way too lazy to cook).
BIG OP TIP
Not sure if it's available in all countries, but there are more and more services similar to this... so here is my biggest tip.
TooGoodToGo (imma sound like im sponsored), is an amazing app, where restaurants and grocery stores put up mystery boxes with food and groceries. You can buy products up to -80% off, and they're all mostly fresh, or the date is a week or two away from expiry. Best deals come from cafe's like Costa or Nero, which post these mystery boxes for pick up late in the afternoon, and you can get various items. From cookies, bread to even full on meals. I've been using the app for a while now and I can say that it really saved me some money, the prices are so cheap it's cheaper than making food on your own.
I'll be posting more tips when I get more ideas, but I still think this thread is relevant and actually a great example of how helpful this community can be.
Much love,
Melrose < 3