Can you invest into retirement while being self employed??? 
YES! 

In the US, you need to opt in to the retirement options. Example, IRA or 401(k) options. 

In Australia, the retirement plan is Superannuation. You can opt to not put money into Superannuation while being self employed.  

The three things you MUST invest in throughout your life:
#1 - Yourself 
#2 - Your business 
#3 - Other peoples business  

Get started HERE: Investing for beginners, start investing with our ILMA Investing Course: https://www.sentinelcoaching.com/investing