Depending on which field you understand, Example if you worked in the technology field you understand how it operate, you can search for companies to invest in. Or you're lazy index funds, etf, bonds. If you want something new, Cryptocurrency. Google your questions, I started off in the cryptospace 2017 Oct without any mentor nor guidance, I just googled my way and learn. How am I able to do it? It's passion and interest. Whatever you're thinking to pick up and understand / learn first you must have a passion and interest for it. Also a tip, never invest into something you do not understand, eventually you will lose your money. Don't listen to anyone telling you to buy this stock or that crypto, always do your own research and due diligence before you put any money.