Don't worry if you went a little overboard with the number of stocks you bought. This is a common error that beginners make and it’s not the end of the world.
What you’ll want to do is look at your portfolio of stocks, and determine what makes sense to move and what you should keep around. For example, if you bought 20 or 30 stocks, consider having fewer stocks from top-performing companies for a more concentrated portfolio.
Just remember that if you sell a stock through a brokerage account and profit from it, you'll have to pay a capital gains tax, and the tax rate is higher if you sell before owning a stock for a full year. If you sell through a traditional IRA, you will pay taxes during retirement.