I want to add something more to you. Regarding the source of income I think one should not start investing only if there is a source of income. Your source of income should be a reliable source of income. There is a big difference between a source of income and a reliable source of income.

Source of income means any source of income, may be part-time or full-time but is not capable of meeting your complete needs or is not sufficient for investment after meeting the needs or there is no guarantee of how long this source of income will last. It is almost impossible to start investing or succeed in investing with such an income source. Investments must have a reliable source of income or an alternative source of income from which you will not need enough money to invest even after meeting your entire needs. There should even be an assurance about how long your source of income will last. If your source of income is viable and investable then we can call it a reliable source of income and eligible for investment. If there is no reliable source of income, I think it is better not to invest.