1. Start with what you know by writing down parents names and grandparents and then start to gather records or resources to validate your information. One may use a free site such as Family Search or Ancestry, a paid site, but you still have to make sure that all records are accurate. 

2. Use a software such as Family Tree Maker can be helpful to help you keep track of your pedigree charts and records.

3. Go to a library such as at a local genealogical society, public library or Family History Center can be quite helpful. 
While there, ask questions how they can assist you.

4. Interview your older relatives who are still alive using an audio or video recorder to document their past. Anecdotes such as family histories can be quite helpful to substantiate historical resources.   Most importantly, interview your oldest relatives so you can write down those timeless family stories.

5. You may want to look at the links and forms page also to give you some paperwork to help you get started. 

 6. Here are helpful guides online:
Getting started in Genealogy:  https://www.smarterhobby.com/genealogy/ 
The Family History Guide:  http://thefhguide.com/ 
The Ultimate Beginner’s Guide to Genealogy:  https://www.dnatestingguides.com/blogs/the-ultimate-beginners-guide-to-genealogy/ 
The Oral History Interview:  https://blogs.ancestry.com/ancestry/2017/09/10/the-oral-history-interview-dont-miss-a-chance-to-record-family-stories/ 
Getting Started:   http://www.nagcnl.org/getting-started-guide/ 
Researching the history of your house:  https://www.homeadvisor.com/r/a-guide-to-researching-the-history-of-a-house/