Welcome to forum. EAD to GC as in adj of status to GC is never a problem .. the only requirement is for your latest employer to fill out 485J. Your second concern is about public charge rule or similar things ... I think with Biden admin your should not worry about anything NEW that is against immigrants.
I do however want to caution you regarding your canadian PR. Do not leave US. Because if you try to come back on AP and while holding canadian PR then US immigration has in the past refused entry to people who applied and obtained canadian PR. Just google and read their experiences.
Nothing to overly worry about. But just wanted you to be aware of this.