Step 1: Pick 1 competitor and find top competitors via SemRush
Example: myhouserabbit (dot) com
Step 2: Do a keyword difficulty analysis of your main competitors to get a list of lower difficulty keywords
Example from rabbit (dot) org
Step 3
Create content around lower difficulty keywords and scale up
These 3 steps give you a place to start by leveraging your existing competition's kw rankings
Example: myhouserabbit (dot) com

Step 2: Do a keyword difficulty analysis of your main competitors to get a list of lower difficulty keywords
Example from rabbit (dot) org

Step 3
Create content around lower difficulty keywords and scale up
These 3 steps give you a place to start by leveraging your existing competition's kw rankings