Before doing anything, you should look through the prerequisite knowledge you need to succeed in the field and what potential career paths interest you. There's plenty of coding tutorial and open courses out there for you to look through and gauge you interest. Here is a good list of open courses that form the basis of most CS degrees.

The next step would be determine how you would go about entering the field. There are several options for you: 1) You can register for a well ranked coding boot-camp; 2) You can apply for CS bridge graduate programs or bridge engineering programs; 3) You can leverage your biology degrees to enter a bioinformatics program with an emphasis on AI; 4) You can do another undergrad but this time in CS.