Some general questions about finding a new PCP, how to find specialists.

Not sure if this is the right place to ask, if there is a better subreddit, please direct me accordingly.

I just got new health insurance from my job, CIGNA OAP 3000 which I don't know much about, I've always had BCBS PPO and also I'm just kinda ignorant about all the different details. I have had the same PCP for a while but am thinking of switching to someone closer to me, and CIGNA has this Cost Efficiency Rating thing. Is it beneficial to go for a 3 star rated provider over a 1 star? My current PCP is only rated 1 star. How does one choose a new PCP? I also have had IBS for a while and think I need to find a new GI specialist as well, would I go through my new PCP or find one on my own? In general, does cost not matter until I reach my $3000 deductible since I'm paying for everything out of pocket?

I appreciated any help!