Obviously in order to invest in something, you need to have some money, or capital, on hand. Different properties can of course have different starting values, and ownership of a piece of property places you on the hook for all loans and fees. To invest you have to consider the worst case, how much could you afford to lose? You can never invest more than that, even if you feel it's a "sure thing".
2. Can you stomach a risk?
Risk is another factor that inherently comes with investing. If you didn't want to take any risk, you can go bury your money in your backyard and forgo all potential interest and profit. While risk taking is important, there are clear differences between calculated and manageable risks and super aggressive, unnecessary risks. For every huge risk that pays off, there are many more that don't. You have to be able to balance your personal tolerance for risks, the potential losses and the potential windfall.
3. Think about the future.
You have to consider why you are investing. Are you looking to turn a quick profit, or are you looking to build revenue over the long haul, for some time down the line? Your plans can change revolving around these answers; different properties and investments can be sold off quicker while others need to be held onto.
4. Are you prepared?
You can't just randomly point to a real estate investment on paper and magically make money. You have to be prepared, you have to do research, you have to manage all of the details and intricacies. If that sort of work and preparation isn't in your nature, you should avoid real estate investing.
5. Clear your schedule.
As mentioned above, you need to properly research all aspects of your real estate investments. This can take a lot of time, and if you shortchange yourself on that, you can find yourself losing money or missing out on opportunities. If life is too busy, it's better to wait until you can clear your schedule enough to really go at it 100%.
Have you passed all the tests? If you can satisfy all of those requirements then you're ready to begin your career or hobby real estate investing, good luck! Although you won't need it if you're properly prepared!