Hello! It is likely that with $3000 you will only be able to purchase stocks from one company. Starting out with only investing in one company is perfectly alright since we will all need to start from somewhere. However, once you are able to gain more capital and can invest in a larger amount, it is important to start diversifying and not only stick to one stock from the same company. However, if you want to be able to diversify from the start, some alternative to stocks would be ETFs and roboadvisors. Roboadvisors essential invest in ETFs as well. This is because when you are investing in ETFs, there will tend to be a large number of stocks and other investments within the fund. Thus, this will make it more diversified than a single stock. Roboadvisors will help you to invest in a range of stocks just like the ETFs, thus engaging a roboadvisor would also help to diversify your portfolio. Hope this helps!