In all honesty, a Transformers board is not the place to ask for this kind of advice, but I've worked with both the nutritional and financial situations, and in both cases, this is a bad idea. Ramen will not give you everything needed even if you supplement heavily. Humans are omnivores for a reason, we have to have a wide range of things to keep going and no amount of vitamin supplements and the like will compensate for all-carbs (and that's all ramen is). For the finances, no 'investment' that you would come across would give you an immediate 2-4x return in normal circumstances. Most retirement funds are based on a consistent 5% return over 25 to 30 years. Even they are iffy right now. The entire system is having issues and has been for a while. No 'sure fire' investment exists, and ANY investment can cause you to loose your principle (initial money) in bad circumstances. Just look at the recent bank collapse, SVB was seen as a safe investment till literally last Friday, then investors lost almost everything and no government program will pay them back. The government actually went out of its way to clearly state that it WON'T pay the investors back. Meanwhile, the treasury bonds that SVB itself had invested in, were considered solid and safe...till the interest rate changed. And that pushed things into a bank run and a collapse.
Like it or not, even if you don't feel like it, you need to just get a job and keep at it. It's the only 'sure thing' right now, and it doesn't need to be a huge aspect of your life. Even the stereotypical fast food place will get you money and then you can leave it at the end of the day, that's not the sort of job that follows you home. It sounds like you've been taken financial advantage of in the past, the best way to avoid that is to control your own finances, not give it to someone else and hope they take care of you. It never works.
You need to actually map out your expenses, with internet, utilities, rent, etc, and yes, FOOD, and see what you actually live on now. Then work out what you need to do to support it. Don't throw your money away on any 'get rich quick' scheme, as that's more likely a way to wind up homeless with no internet, expensive coffee, or HEAT. And beleive me, I know, being cold without any shelter is not 'uncomfortable', it HURTS. Exposure without shelter hurts far more than anyone would beleive and if they don't beleive me on that, good, it means they didn't ever have anything to change their minds. Lucky for them.