Yes, of course you can create a strategy. In the Betamin Builder tool you can create strategies privately, and also share them and make them public, all completely free of charge for the Home Win market, for the rest of the markets it is necessary to purchase a picks package. To do so, all you have to do is register on the website and access the tool.
What you will not be able to do if you are not a Premium user is to receive the picks generated by that strategy to be able to bet, you will only be able to see the picks that have been generated in the past.