Hello and TIA for any assistance
Is it possible to apply for family based immigration for a minor child while the parent is only a conditional green card holder?
What was the basis for your green card?
There is no such thing as an I-130 "self filer"
self filer = you do the paper work yourself sans lawyer
gc holder obtained gc from marriage to us citizen
There is not enough detailed information in the post. OP, look at the requirements for step-parent sponsorship.
Immigration for child of conditional GC parent