The solution to both is investing in stock index funds and ETFs. While mutual funds might require a $1,000 minimum or more, index fund minimums tend to be lower (and ETFs are purchased for a share price that could be lower still). Two brokers, Fidelity and Charles Schwab, offer index funds with no minimum at all. Index funds also cure the diversification issue because they hold many different stocks within a single fund.
Stock mutual funds or exchange-traded funds. These mutual funds let you purchase small pieces of many different stocks in a single transaction. Index funds and ETFs are a kind of mutual fund that track an index; for example, a Standard & Poor’s 500 fund replicates that index by buying the stock of the companies in it. When you invest in a fund, you also own small pieces of each of those companies. You can put several funds together to build a diversified portfolio. Note that stock mutual funds are also sometimes called equity mutual funds.
At $4.95 per trade, with no inactivity charge and a $50 full outgoing transfer fee, Ally Invest’s fee structure is about as low as you'll find. Even though a rash of brokers dropped their commissions in 2017 to be competitive with Ally Invest’s $4.95 flat rate, Ally keeps its edge with a zero account minimum and enticing discount for active investors — equity trades drop to $3.95 for users with 30-plus trades each quarter or a balance of $100,000.
IMPORTANT – Like paid subscriptions, be careful with classes and courses. Most are easily over $1,000 and are sold with false promises to acquiring valuable knowledge. Their fantastic sales funnels will suck you in, take your money, excite you during the course, then leave you with a strategy that wasn’t even profitable to begin with. See, 10 Things I Wish I Knew About Trading Before I Got Started.
Ignore “hot tips.” WallStreetHotShot4721 on the EZMillion$Trade forum and the folks who pay for sponsored ads touting sure-thing stocks are not your friends, mentors or bona fide Wall Street gurus. In many cases, they are part of a pump-and-dump racket where shady folks purchase buckets of shares in a little-known, thinly traded company (often a penny stock) and hit the internet to hype it up. As unwitting investors load up on shares and drive the price up, the crooks take their profits, dump their shares and send the stock careening back to earth. Don’t help them line their pockets. If you’re looking for a guru, bookmark Warren Buffett’s annual letters to shareholders for commonsense advice and observations on sane, long-term investing.

Robo-advisors like Wealthsimple, Wealthfront, and Betterment use algorithms to determine your investment strategy. You just plug in your time frame and risk tolerance and their computers do the rest. And because they’re targeted for a younger crowd, fees are rock bottom. Wealthsimple and Betterment both have no account minimum, while Wealthfront requires $500. Wealthsimple charges an annual 0.5% advising fee; Wealthfront and Betterment charge just 0.25%.
If you trade stock regularly, you might find yourself accidentally violating the dreaded wash-sale rule. This means you've sold shares of stock and then bought the same or similar shares shortly thereafter. This can cost you huge tax penalties. With a little planning, you can avoid this fate and still enjoy trading stocks aggressively with a little planning. 
How much money do I need to start investing in stocks? The amount of money you need to buy an individual stock depends on how expensive the shares are. (Share prices can range from just a few dollars to a few thousand dollars.) If you want mutual funds and have a small budget, an exchange-traded fund (ETF) may be your best bet. Mutual funds often have minimums of $1,000 or more, but ETFs trade like a stock, which means you purchase them for a share price — in some cases, less than $100).