Planning to change the career

I am in the digital marketing field earning 8.5l / annum , 8yr ex. I reached a point where I no longer found the work is interesting and also have some commitment to fulfill financially.

I am 5 months pregnant now, and will get 6 months of maternity leave from may. In the maternity period I am planning to learn something and change the career to learn at least 15L / 20L per year.

Any suggestions or advice for me on how to plan further.