First, it takes years to become true expert in a particular branch of software development. There is no switch career button. You just have to put in the hours to grow as a developer. You will spend the rest of your thirties just catching up with your peers. It's for you to decide whether you have the patience to do that persistently.

Second, like any other white collar job, your earning potential is heavily backloaded. An early career software developer doesn't really make a lot of money. Even assuming that you are good, you well be well into your forties before you start making the big bucks. In the meantime, you'll be earning significantly less than your peers.

Third, you could really screw up your WLB if you don't choose your employer right. People with non-traditional background often end up in terrible companies which use developers as expendable labor in stead of investing in their growth.

I highly recommend that you explore opportunities in software development, but be aware of the challenges.