Currently a JC student, should I start my investing journey? I get $50 per week allowance every month, should I invest these money and skip meals in school?

Good to start early and please don't skip meals. 50/week pocket money is limited but if you can set aside 15/week or 60/mth, you can get started with robo Investment. If you invest consistently; by the time you grad from uni, you'll be sitting on a substantial pile of cash.

Another tip is to find a part time job to increase your income and invest more. Just make sure it doesn't affect your studies.

Your potential human capital is more than the money you save up from scrimping and saving and the neglect may even hurt your human capital.

If you need the money in the near future (e.g. pay off college fees) then you should not be investing the money in portfolios with more equities. You can adopt lower-risk accounts like cash management or insurance savings.​​​

Skip breaks (ie snack drinks) yes but a big no no for meals.

Rather than reading up on investment doing investment research, you should be spending almost all of your time studying. That is also a form of investment (in future earning power). You will have a lot of time to read up on investment while you are in NS or while waiting for your A level result/ Uni to start (sry u didn't mention your gender so I cover both)

As a student the primary focus should be on getting good results.

Instead of trying to save from a limited $50/week, if your academic results are good, you can consider doing some online tutoring for pay to increase your available funds instead.

Reducing spending may be an important component of budgeting but it is strictly limited compared to increasing income.