Is it safe to assume you have read one or more of the following sources?
1) Chapter 1 of The Elements of Investing by Malkiel and Ellis
2) Pages 143 – 144 and 152 – 154 of The Investor's Manifesto by William J. Bernstein
3) Pages 179 – 184 of The Power of Passive Investing by Richard Ferri
4) Rule 1 (Chapter 1) of Millionaire Teacher by Andrew Hallam
Using these resources, and armed with $1,000 in hand, locate a discount broker so you have a conduit into what we call the Stock Market. For a number of reasons I prefer TDAmeritrade as my discount broker. Their monthly reporting forms are well laid out and understandable. TDA has 101 commission free ETFs, cutting costs to the consumer. There are other good discount brokers, so Google "discount brokers" and make a choice.
After you opened up an account and signed all the papers, be sure you have instructions as to how to access your account electronically. You will need to know the name of the account as well as the password. TDAmeritrade will ask you to fill out the answers to five questions such as what is the name of your first dog. You can select the questions and the answers. That is about all there is to setting up an account.
So my account is open and set up to purchase shares of something. What is the next step as I don't have a clue what to purchase with my $1,000? To keep it very simple, I suggest investing 35% in the U.S. Equities market with a purchase of VTI. Place another 35% in the international market with shares of VEU. Put the last 30% in bonds. I would likely go with an intermediate bond ETF such as BIV.
This is a "get-your-feet-wet" type of portfolio. You now hold three baskets of stocks giving you worldwide exposure with only three investments. Now wait a month before making your next purchase.