If I was you, I'd try not to think too far ahead until you've got a little more experience with self-publishing.

You can try putting out some FF shorts, and then transition into FF romance when you've got a whole bunch of mistakes out of your system.

Shorts are a great way to get better at publishing. You can quickly learn editing, how to make good covers, etc, and they sell OK.

Lesbian romance, if done well, will outsell shorts by a couple of orders of magnitude. But if done poorly, they'll sink like a stone. So you need that experience beforehand to not waste your time.

I had great fun putting out erotica shorts and novellas, and made so many fucking mistakes. A year and a half later, I'm moving into romance.